diff --git a/src/libespeak-ng/readclause.c b/src/libespeak-ng/readclause.c
index 56503557..d5ea4533 100644
--- a/src/libespeak-ng/readclause.c
+++ b/src/libespeak-ng/readclause.c
@@ -669,31 +669,6 @@ static void SetProsodyParameter(int param_type, wchar_t *attr1, PARAM_STACK *sp)
 	}
 }
 
-static int ReplaceKeyName(char *outbuf, int index, int *outix)
-{
-	// Replace some key-names by single characters, so they can be pronounced in different languages
-	static MNEM_TAB keynames[] = {
-		{ "space ",        0xe020 },
-		{ "tab ",          0xe009 },
-		{ "underscore ",   0xe05f },
-		{ "double-quote ", '"' },
-		{ NULL,            0 }
-	};
-
-	int ix;
-	int letter;
-	char *p;
-
-	p = &outbuf[index];
-
-	if ((letter = LookupMnem(keynames, p)) != 0) {
-		ix = utf8_out(letter, p);
-		*outix = index + ix;
-		return letter;
-	}
-	return 0;
-}
-
 static int ProcessSsmlTag(wchar_t *xml_buf, char *outbuf, int *outix, int n_outbuf, bool self_closing)
 {
 	// xml_buf is the tag and attributes with a zero terminator in place of the original '>'
diff --git a/src/libespeak-ng/ssml.c b/src/libespeak-ng/ssml.c
index 58a4eab8..295dc9f4 100644
--- a/src/libespeak-ng/ssml.c
+++ b/src/libespeak-ng/ssml.c
@@ -414,3 +414,28 @@ wchar_t *GetSsmlAttribute(wchar_t *pw, const char *name)
 	return NULL;
 }
 
+int ReplaceKeyName(char *outbuf, int index, int *outix)
+{
+	// Replace some key-names by single characters, so they can be pronounced in different languages
+	static MNEM_TAB keynames[] = {
+		{ "space ",        0xe020 },
+		{ "tab ",          0xe009 },
+		{ "underscore ",   0xe05f },
+		{ "double-quote ", '"' },
+		{ NULL,            0 }
+	};
+
+	int ix;
+	int letter;
+	char *p;
+
+	p = &outbuf[index];
+
+	if ((letter = LookupMnem(keynames, p)) != 0) {
+		ix = utf8_out(letter, p);
+		*outix = index + ix;
+		return letter;
+	}
+	return 0;
+}
+
diff --git a/src/libespeak-ng/ssml.h b/src/libespeak-ng/ssml.h
index 0811ec04..3ae9ce32 100644
--- a/src/libespeak-ng/ssml.h
+++ b/src/libespeak-ng/ssml.h
@@ -81,3 +81,4 @@ void ProcessParamStack(char *outbuf, int *outix, int n_param_stack, PARAM_STACK
 PARAM_STACK *PushParamStack(int tag_type, int *n_param_stack, PARAM_STACK *param_stack);
 const char *VoiceFromStack(SSML_STACK *ssml_stack, int n_ssml_stack, espeak_VOICE *base_voice, char base_voice_variant_name[40]);
 void PopParamStack(int tag_type, char *outbuf, int *outix, int *n_param_stack, PARAM_STACK *param_stack, int *speech_parameters);
+int ReplaceKeyName(char *outbuf, int index, int *outix);