diff --git a/src/libespeak-ng/espeak_command.c b/src/libespeak-ng/espeak_command.c
index 02939dc2..f5d10997 100644
--- a/src/libespeak-ng/espeak_command.c
+++ b/src/libespeak-ng/espeak_command.c
@@ -379,7 +379,7 @@ void process_espeak_command(t_espeak_command *the_command)
 	case ET_TEXT:
 	{
 		t_espeak_text *data = &(the_command->u.my_text);
-		sync_espeak_Synth(data->unique_identifier, data->text, data->size,
+		sync_espeak_Synth(data->unique_identifier, data->text,
 		                  data->position, data->position_type,
 		                  data->end_position, data->flags, data->user_data);
 	}
@@ -387,7 +387,7 @@ void process_espeak_command(t_espeak_command *the_command)
 	case ET_MARK:
 	{
 		t_espeak_mark *data = &(the_command->u.my_mark);
-		sync_espeak_Synth_Mark(data->unique_identifier, data->text, data->size,
+		sync_espeak_Synth_Mark(data->unique_identifier, data->text,
 		                       data->index_mark, data->end_position, data->flags,
 		                       data->user_data);
 	}
diff --git a/src/libespeak-ng/espeak_command.h b/src/libespeak-ng/espeak_command.h
index 8a54e4c6..df1901cf 100644
--- a/src/libespeak-ng/espeak_command.h
+++ b/src/libespeak-ng/espeak_command.h
@@ -133,10 +133,10 @@ void process_espeak_command(t_espeak_command *the_command);
 
 int delete_espeak_command(t_espeak_command *the_command);
 
-espeak_ERROR sync_espeak_Synth(unsigned int unique_identifier, const void *text, size_t size,
+espeak_ERROR sync_espeak_Synth(unsigned int unique_identifier, const void *text,
                                unsigned int position, espeak_POSITION_TYPE position_type,
                                unsigned int end_position, unsigned int flags, void *user_data);
-espeak_ERROR sync_espeak_Synth_Mark(unsigned int unique_identifier, const void *text, size_t size,
+espeak_ERROR sync_espeak_Synth_Mark(unsigned int unique_identifier, const void *text,
                                     const char *index_mark, unsigned int end_position,
                                     unsigned int flags, void *user_data);
 void sync_espeak_Key(const char *key);
diff --git a/src/libespeak-ng/speech.c b/src/libespeak-ng/speech.c
index 5e57da87..4145249c 100644
--- a/src/libespeak-ng/speech.c
+++ b/src/libespeak-ng/speech.c
@@ -511,12 +511,10 @@ void MarkerEvent(int type, unsigned int char_position, int value, int value2, un
 		ep->id.number = value;
 }
 
-espeak_ERROR sync_espeak_Synth(unsigned int unique_identifier, const void *text, size_t size,
+espeak_ERROR sync_espeak_Synth(unsigned int unique_identifier, const void *text,
                                unsigned int position, espeak_POSITION_TYPE position_type,
                                unsigned int end_position, unsigned int flags, void *user_data)
 {
-	(void)size; // unused
-
 	espeak_ERROR aStatus;
 
 	InitText(flags);
@@ -552,12 +550,10 @@ espeak_ERROR sync_espeak_Synth(unsigned int unique_identifier, const void *text,
 	return aStatus;
 }
 
-espeak_ERROR sync_espeak_Synth_Mark(unsigned int unique_identifier, const void *text, size_t size,
+espeak_ERROR sync_espeak_Synth_Mark(unsigned int unique_identifier, const void *text,
                                     const char *index_mark, unsigned int end_position,
                                     unsigned int flags, void *user_data)
 {
-	(void)size; // unused
-
 	espeak_ERROR aStatus;
 
 	InitText(flags);
@@ -645,6 +641,8 @@ ESPEAK_API espeak_ERROR espeak_Synth(const void *text, size_t size,
                                      unsigned int end_position, unsigned int flags,
                                      unsigned int *unique_identifier, void *user_data)
 {
+	(void)size; // unused
+
 	if (f_logespeak) {
 		fprintf(f_logespeak, "\nSYNTH posn %d %d %d flags 0x%x\n%s\n", position, end_position, position_type, flags, (const char *)text);
 		fflush(f_logespeak);
@@ -658,7 +656,7 @@ ESPEAK_API espeak_ERROR espeak_Synth(const void *text, size_t size,
 	*unique_identifier = 0;
 
 	if (my_mode & ENOUTPUT_MODE_SYNCHRONOUS)
-		return sync_espeak_Synth(0, text, size, position, position_type, end_position, flags, user_data);
+		return sync_espeak_Synth(0, text, position, position_type, end_position, flags, user_data);
 
 #ifdef USE_ASYNC
 	// Create the text command
@@ -693,6 +691,8 @@ ESPEAK_API espeak_ERROR espeak_Synth_Mark(const void *text, size_t size,
                                           unsigned int *unique_identifier,
                                           void *user_data)
 {
+	(void)size; // unused
+
 	espeak_ERROR a_error = EE_OK;
 	static unsigned int temp_identifier;
 
@@ -704,7 +704,7 @@ ESPEAK_API espeak_ERROR espeak_Synth_Mark(const void *text, size_t size,
 	*unique_identifier = 0;
 
 	if (my_mode & ENOUTPUT_MODE_SYNCHRONOUS)
-		return sync_espeak_Synth_Mark(0, text, size, index_mark, end_position, flags, user_data);
+		return sync_espeak_Synth_Mark(0, text, index_mark, end_position, flags, user_data);
 
 #ifdef USE_ASYNC
 	// Create the mark command