diff --git a/libs/libteletone/src/libteletone_detect.h b/libs/libteletone/src/libteletone_detect.h
index 359fbb89bc..d8c47136ba 100644
--- a/libs/libteletone/src/libteletone_detect.h
+++ b/libs/libteletone/src/libteletone_detect.h
@@ -202,7 +202,7 @@ extern "C" {
 	  \param mt the multi-frequency tone descriptor
 	  \param map a representation of the multi-frequency tone
 	*/
-	void teletone_multi_tone_init(teletone_multi_tone_t *mt, teletone_tone_map_t *map);
+TELETONE_API void teletone_multi_tone_init(teletone_multi_tone_t *mt, teletone_tone_map_t *map);
 
 	/*! 
 	  \brief Check a sample buffer for the presence of the mulit-frequency tone described by mt
@@ -211,7 +211,7 @@ extern "C" {
 	  \param samples the number of samples present in sample_buffer
 	  \return true when the tone was detected or false when it is not
 	*/
-	int teletone_multi_tone_detect (teletone_multi_tone_t *mt,
+TELETONE_API int teletone_multi_tone_detect (teletone_multi_tone_t *mt,
 									int16_t sample_buffer[],
 									int samples);
 
@@ -220,7 +220,7 @@ extern "C" {
 	  \param dtmf_detect_state the DTMF detection state to initilize
 	  \param sample_rate the desired sample rate
 	*/
-	void teletone_dtmf_detect_init (teletone_dtmf_detect_state_t *dtmf_detect_state, int sample_rate);
+TELETONE_API void teletone_dtmf_detect_init (teletone_dtmf_detect_state_t *dtmf_detect_state, int sample_rate);
 
 	/*! 
 	  \brief Check a sample buffer for the presence of DTMF digits
@@ -229,7 +229,7 @@ extern "C" {
 	  \param samples the number of samples present in sample_buffer
 	  \return true when DTMF was detected or false when it is not
 	*/
-	int teletone_dtmf_detect (teletone_dtmf_detect_state_t *dtmf_detect_state,
+TELETONE_API int teletone_dtmf_detect (teletone_dtmf_detect_state_t *dtmf_detect_state,
 							  int16_t sample_buffer[],
 							  int samples);
 	/*! 
@@ -239,7 +239,7 @@ extern "C" {
 	  \param max the maximum length of buf
 	  \return the number of characters written to buf
 	*/
-	int teletone_dtmf_get (teletone_dtmf_detect_state_t *dtmf_detect_state,
+TELETONE_API int teletone_dtmf_get (teletone_dtmf_detect_state_t *dtmf_detect_state,
 						   char *buf,
 						   int max);
 
@@ -249,7 +249,7 @@ extern "C" {
 	  \param sample_buffer an array aof 16 bit signed linear samples
 	  \param samples the number of samples present in sample_buffer
 	*/
-	void teletone_goertzel_update(teletone_goertzel_state_t *goertzel_state,
+TELETONE_API void teletone_goertzel_update(teletone_goertzel_state_t *goertzel_state,
 								  int16_t sample_buffer[],
 								  int samples);