diff --git a/src/include/switch_core.h b/src/include/switch_core.h
index 6c220e469b..fe54a0c527 100644
--- a/src/include/switch_core.h
+++ b/src/include/switch_core.h
@@ -814,8 +814,8 @@ SWITCH_DECLARE(switch_status) switch_core_speech_feed_tts(switch_speech_handle *
 */
 	SWITCH_DECLARE(switch_status) switch_core_speech_read_tts(switch_speech_handle *sh, 
 														  void *data,
-														  unsigned int *datalen,
-														  unsigned int *rate,
+														  size_t *datalen,
+														  size_t *rate,
 														  switch_speech_flag *flags);
 /*! 
   \brief Close an open speech handle
diff --git a/src/include/switch_module_interfaces.h b/src/include/switch_module_interfaces.h
index d7277873ed..3f42b4d3eb 100644
--- a/src/include/switch_module_interfaces.h
+++ b/src/include/switch_module_interfaces.h
@@ -300,8 +300,8 @@ struct switch_speech_interface {
 	/*! function to read audio from the TTS*/
 	switch_status (*speech_read_tts)(switch_speech_handle *sh,
 									 void *data,
-									 unsigned int *datalen,
-									 unsigned int *rate,
+									 size_t *datalen,
+									 size_t *rate,
 									 switch_speech_flag *flags);
 
 	const struct switch_speech_interface *next;
diff --git a/src/switch_core.c b/src/switch_core.c
index fcb6b6001b..c049509772 100644
--- a/src/switch_core.c
+++ b/src/switch_core.c
@@ -523,8 +523,8 @@ SWITCH_DECLARE(switch_status) switch_core_speech_feed_tts(switch_speech_handle *
 
 SWITCH_DECLARE(switch_status) switch_core_speech_read_tts(switch_speech_handle *sh, 
 														  void *data,
-														  unsigned int *datalen,
-														  unsigned int *rate,
+														  size_t *datalen,
+														  size_t *rate,
 														  switch_speech_flag *flags)
 {
 	assert(sh != NULL);