diff --git a/src/libespeak-ng/dictionary.c b/src/libespeak-ng/dictionary.c
index 8d50e7b9..ae0157d9 100644
--- a/src/libespeak-ng/dictionary.c
+++ b/src/libespeak-ng/dictionary.c
@@ -33,6 +33,7 @@
 
 #include "readclause.h"
 #include "synthdata.h"
+#include "numbers.h"
 
 #include "speech.h"
 #include "phoneme.h"
diff --git a/src/libespeak-ng/numbers.c b/src/libespeak-ng/numbers.c
index 06ba264c..851f6165 100644
--- a/src/libespeak-ng/numbers.c
+++ b/src/libespeak-ng/numbers.c
@@ -32,6 +32,7 @@
 #include <espeak-ng/encoding.h>
 
 #include "readclause.h"
+#include "numbers.h"
 
 #include "phoneme.h"
 #include "voice.h"
diff --git a/src/libespeak-ng/numbers.h b/src/libespeak-ng/numbers.h
new file mode 100644
index 00000000..822ab272
--- /dev/null
+++ b/src/libespeak-ng/numbers.h
@@ -0,0 +1,43 @@
+/*
+ * 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_NUMBERS_H
+#define ESPEAK_NG_NUMBERS_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+void LookupAccentedLetter(Translator *tr, unsigned int letter, char *ph_buf);
+void LookupLetter(Translator *tr, unsigned int letter, int next_byte, char *ph_buf1, int control);
+int IsSuperscript(int letter);
+void SetSpellingStress(Translator *tr, char *phonemes, int control, int n_chars);
+int TranslateRoman(Translator *tr, char *word, char *ph_out, WORD_TAB *wtab);
+int TranslateNumber(Translator *tr, char *word1, char *ph_out, unsigned int *flags, WORD_TAB *wtab, int control);
+int TranslateLetter(Translator *tr, char *word, char *phonemes, int control);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
diff --git a/src/libespeak-ng/translate.c b/src/libespeak-ng/translate.c
index 5e7268ac..c5a7278c 100644
--- a/src/libespeak-ng/translate.c
+++ b/src/libespeak-ng/translate.c
@@ -34,6 +34,7 @@
 
 #include "readclause.h"
 #include "phonemelist.h"
+#include "numbers.h"
 
 #include "speech.h"
 #include "phoneme.h"
diff --git a/src/libespeak-ng/translate.h b/src/libespeak-ng/translate.h
index 4ac71987..2a272720 100644
--- a/src/libespeak-ng/translate.h
+++ b/src/libespeak-ng/translate.h
@@ -710,7 +710,6 @@ int IsDigit(unsigned int c);
 int IsDigit09(unsigned int c);
 int IsAlpha(unsigned int c);
 int IsVowel(Translator *tr, int c);
-int IsSuperscript(int letter);
 int isspace2(unsigned int c);
 const char *GetTranslatedPhonemeString(int phoneme_mode);
 ALPHABET *AlphabetFromChar(int c);
@@ -722,14 +721,7 @@ void ProcessLanguageOptions(LANGUAGE_OPTIONS *langopts);
 int Lookup(Translator *tr, const char *word, char *ph_out);
 int LookupFlags(Translator *tr, const char *word, unsigned int **flags_out);
 
-int TranslateNumber(Translator *tr, char *word1, char *ph_out, unsigned int *flags, WORD_TAB *wtab, int control);
-int TranslateRoman(Translator *tr, char *word, char *ph_out, WORD_TAB *wtab);
-
 void ChangeWordStress(Translator *tr, char *word, int new_stress);
-void SetSpellingStress(Translator *tr, char *phonemes, int control, int n_chars);
-int TranslateLetter(Translator *tr, char *letter, char *phonemes, int control);
-void LookupLetter(Translator *tr, unsigned int letter, int next_byte, char *ph_buf, int control);
-void LookupAccentedLetter(Translator *tr, unsigned int letter, char *ph_buf);
 
 int LoadDictionary(Translator *tr, const char *name, int no_error);
 int LookupDictList(Translator *tr, char **wordptr, char *ph_out, unsigned int *flags, int end_flags, WORD_TAB *wtab);