diff --git a/src/libespeak-ng/compiledata.c b/src/libespeak-ng/compiledata.c
index 250b78b3..245dbb77 100644
--- a/src/libespeak-ng/compiledata.c
+++ b/src/libespeak-ng/compiledata.c
@@ -35,6 +35,8 @@
 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
+#include "readclause.h" 
+
 #include "error.h"
 #include "phoneme.h"
 #include "voice.h"
diff --git a/src/libespeak-ng/compiledict.c b/src/libespeak-ng/compiledict.c
index 2a472f49..7e5857c4 100644
--- a/src/libespeak-ng/compiledict.c
+++ b/src/libespeak-ng/compiledict.c
@@ -33,6 +33,8 @@
 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
+#include "readclause.h"
+
 #include "error.h"
 #include "speech.h"
 #include "phoneme.h"
diff --git a/src/libespeak-ng/dictionary.c b/src/libespeak-ng/dictionary.c
index 5ab68fe4..8832f6b4 100644
--- a/src/libespeak-ng/dictionary.c
+++ b/src/libespeak-ng/dictionary.c
@@ -31,6 +31,8 @@
 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
+#include "readclause.h"
+
 #include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
diff --git a/src/libespeak-ng/numbers.c b/src/libespeak-ng/numbers.c
index 8c9ad205..06ba264c 100644
--- a/src/libespeak-ng/numbers.c
+++ b/src/libespeak-ng/numbers.c
@@ -31,6 +31,8 @@
 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
+#include "readclause.h"
+
 #include "phoneme.h"
 #include "voice.h"
 #include "synthesize.h"
diff --git a/src/libespeak-ng/readclause.c b/src/libespeak-ng/readclause.c
index 42cfe54e..2a9cb1b1 100644
--- a/src/libespeak-ng/readclause.c
+++ b/src/libespeak-ng/readclause.c
@@ -36,6 +36,8 @@
 #include <espeak-ng/encoding.h>
 #include <ucd/ucd.h>
 
+#include "readclause.h"
+
 #include "error.h"
 #include "speech.h"
 #include "phoneme.h"
diff --git a/src/libespeak-ng/readclause.h b/src/libespeak-ng/readclause.h
new file mode 100644
index 00000000..3a1bb37e
--- /dev/null
+++ b/src/libespeak-ng/readclause.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2005 to 2015 by Jonathan Duddington
+ * email: jonsd@users.sourceforge.net
+ * Copyright (C) 2015-2018 Reece H. Dunn
+ * Copyright (C) 2018 Juho Hiltunen
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see: <http://www.gnu.org/licenses/>.
+ */
+#ifndef ESPEAK_NG_READCLAUSE_H
+#define ESPEAK_NG_READCLAUSE_H
+
+#include "translate.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+typedef struct {
+	int type;
+	int parameter[N_SPEECH_PARAM];
+} PARAM_STACK;
+
+extern PARAM_STACK param_stack[];
+extern const int param_defaults[N_SPEECH_PARAM];
+
+ int clause_type_from_codepoint(uint32_t c);
+int towlower2(unsigned int c); // Supports Turkish I
+int Eof(void);
+const char *WordToString2(unsigned int word);
+int Read4Bytes(FILE *f);
+int LoadSoundFile2(const char *fname);
+int AddNameData(const char *name,
+                int wide);
+int ReadClause(Translator *tr,
+		char *buf,
+		short *charix,
+		int *charix_top,
+		int n_buf,
+		int *tone_type,
+		char *voice_change);
+
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
diff --git a/src/libespeak-ng/setlengths.c b/src/libespeak-ng/setlengths.c
index 831e2f51..367cd883 100644
--- a/src/libespeak-ng/setlengths.c
+++ b/src/libespeak-ng/setlengths.c
@@ -28,6 +28,8 @@
 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
+#include "readclause.h"
+
 #include "phoneme.h"
 #include "voice.h"
 #include "synthesize.h"
diff --git a/src/libespeak-ng/speech.c b/src/libespeak-ng/speech.c
index 7dc58e65..0dfe3bdd 100644
--- a/src/libespeak-ng/speech.c
+++ b/src/libespeak-ng/speech.c
@@ -48,6 +48,8 @@
 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
+#include "readclause.h"
+
 #include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
diff --git a/src/libespeak-ng/ssml.c b/src/libespeak-ng/ssml.c
index 6c566596..6af0eb15 100644
--- a/src/libespeak-ng/ssml.c
+++ b/src/libespeak-ng/ssml.c
@@ -39,6 +39,8 @@
 #include <espeak-ng/encoding.h>
 #include <ucd/ucd.h>
 
+#include "readclause.h"
+
 #include "error.h"
 #include "speech.h"
 #include "phoneme.h"
diff --git a/src/libespeak-ng/ssml.h b/src/libespeak-ng/ssml.h
index f47f213c..29cd1530 100644
--- a/src/libespeak-ng/ssml.h
+++ b/src/libespeak-ng/ssml.h
@@ -62,11 +62,6 @@ typedef struct {
 #define HTML_NOSPACE     16   // don't insert a space for this element, so it doesn't break a word
 #define SSML_CLOSE       0x20 // for a closing tag, OR this with the tag type
 
-int LoadSoundFile2(const char *fname);
-
-int AddNameData(const char *name,
-                int wide);
-
 int ProcessSsmlTag(wchar_t *xml_buf,
                    char *outbuf,
                    int *outix,
diff --git a/src/libespeak-ng/synth_mbrola.c b/src/libespeak-ng/synth_mbrola.c
index b3473f8e..534b0163 100644
--- a/src/libespeak-ng/synth_mbrola.c
+++ b/src/libespeak-ng/synth_mbrola.c
@@ -32,6 +32,8 @@
 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
+#include "readclause.h"
+
 #include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
diff --git a/src/libespeak-ng/synthdata.c b/src/libespeak-ng/synthdata.c
index 81ce99d4..019c2f6f 100644
--- a/src/libespeak-ng/synthdata.c
+++ b/src/libespeak-ng/synthdata.c
@@ -31,6 +31,8 @@
 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
+#include "readclause.h"
+
 #include "error.h"
 #include "speech.h"
 #include "phoneme.h"
diff --git a/src/libespeak-ng/synthesize.h b/src/libespeak-ng/synthesize.h
index d5b3a50b..5299174b 100644
--- a/src/libespeak-ng/synthesize.h
+++ b/src/libespeak-ng/synthesize.h
@@ -513,7 +513,6 @@ int  SelectPhonemeTableName(const char *name);
 int FormantTransition2(frameref_t *seq, int *n_frames, unsigned int data1, unsigned int data2, PHONEME_TAB *other_ph, int which);
 
 void Write4Bytes(FILE *f, int value);
-int Read4Bytes(FILE *f);
 int Reverse4Bytes(int word);
 
 #if HAVE_SONIC_H
diff --git a/src/libespeak-ng/translate.c b/src/libespeak-ng/translate.c
index 3ab9d939..7666d169 100644
--- a/src/libespeak-ng/translate.c
+++ b/src/libespeak-ng/translate.c
@@ -32,6 +32,8 @@
 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
+#include "readclause.h"
+
 #include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
diff --git a/src/libespeak-ng/translate.h b/src/libespeak-ng/translate.h
index e5e2b2cb..7dfccc9d 100644
--- a/src/libespeak-ng/translate.h
+++ b/src/libespeak-ng/translate.h
@@ -246,8 +246,6 @@ extern "C"
 #define CLAUSE_COLON       (30 | CLAUSE_INTONATION_FULL_STOP   | CLAUSE_TYPE_CLAUSE)
 #define CLAUSE_SEMICOLON   (30 | CLAUSE_INTONATION_COMMA       | CLAUSE_TYPE_CLAUSE)
 
-int clause_type_from_codepoint(uint32_t c);
-
 //@}
 
 #define SAYAS_CHARS        0x12
@@ -277,14 +275,6 @@ typedef struct {
 	unsigned char length;
 } WORD_TAB;
 
-typedef struct {
-	int type;
-	int parameter[N_SPEECH_PARAM];
-} PARAM_STACK;
-
-extern PARAM_STACK param_stack[];
-extern const int param_defaults[N_SPEECH_PARAM];
-
 typedef struct {
 	const char *name;
 	int offset;
@@ -711,7 +701,6 @@ int utf8_nbytes(const char *buf);
 
 int lookupwchar(const unsigned short *list, int c);
 int lookupwchar2(const unsigned short *list, int c);
-int Eof(void);
 char *strchr_w(const char *s, int c);
 int IsBracket(int c);
 void InitNamedata(void);
@@ -723,9 +712,7 @@ int IsAlpha(unsigned int c);
 int IsVowel(Translator *tr, int c);
 int IsSuperscript(int letter);
 int isspace2(unsigned int c);
-int towlower2(unsigned int c); // Supports Turkish I
 const char *GetTranslatedPhonemeString(int phoneme_mode);
-const char *WordToString2(unsigned int word);
 ALPHABET *AlphabetFromChar(int c);
 
 Translator *SelectTranslator(const char *name);
@@ -764,7 +751,6 @@ void SetWordStress(Translator *tr, char *output, unsigned int *dictionary_flags,
 int TranslateRules(Translator *tr, char *p, char *phonemes, int size, char *end_phonemes, int end_flags, unsigned int *dict_flags);
 int TranslateWord(Translator *tr, char *word1, WORD_TAB *wtab, char *word_out);
 void TranslateClause(Translator *tr, int *tone, char **voice_change);
-int ReadClause(Translator *tr, char *buf, short *charix, int *charix_top, int n_buf, int *tone_type, char *voice_change);
 
 void SetVoiceStack(espeak_VOICE *v, const char *variant_name);
 void InterpretPhoneme(Translator *tr, int control, PHONEME_LIST *plist, PHONEME_DATA *phdata, WORD_PH_DATA *worddata);
diff --git a/src/libespeak-ng/voices.c b/src/libespeak-ng/voices.c
index 78cef626..db5f131e 100644
--- a/src/libespeak-ng/voices.c
+++ b/src/libespeak-ng/voices.c
@@ -38,6 +38,8 @@
 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
+#include "readclause.h"
+
 #include "speech.h"
 #include "phoneme.h"
 #include "voice.h"