diff --git a/lib_dec/lib_dec.c b/lib_dec/lib_dec.c
index dcf01c66eefbb2e67d46248117f169ae53e5c581..284cac1570ef57bb8a703116a0a43324738d0e61 100644
--- a/lib_dec/lib_dec.c
+++ b/lib_dec/lib_dec.c
@@ -552,13 +552,14 @@ ivas_error IVAS_DEC_EnableSplitRendering(
     return IVAS_ERR_OK;
 }
 
+
 /*---------------------------------------------------------------------*
  * get_render_framesize_ms( )
  *
  * Get the 5ms flag
  *---------------------------------------------------------------------*/
 
-int16_t get_render_frame_size_ms(
+static int16_t get_render_frame_size_ms(
     const IVAS_RENDER_FRAMESIZE render_framesize )
 {
     return (int16_t) ( render_framesize * ( 1000 / ( FRAMES_PER_SEC * IVAS_MAX_PARAM_SPATIAL_SUBFRAMES ) ) );
@@ -595,6 +596,7 @@ ivas_error IVAS_DEC_SetRenderFramesize(
     return IVAS_ERR_OK;
 }
 
+
 /*---------------------------------------------------------------------*
  * IVAS_DEC_GetGetRenderFramesize( )
  *
@@ -2512,22 +2514,28 @@ ivas_error IVAS_DEC_VoIP_SetScale(
     return error;
 }
 
+
 /*---------------------------------------------------------------------*
- * IVAS_DEC_VoIP_SetScale( )
+ * IVAS_DEC_TSM_SetQuality( )
+ *
+ * set the quality theshold for the time scale modiciation that is used
+ * to determine if the TSM yielded a signal that satisfies the minimum
+ * quality requirements.
+ * quality is lower limit for minimum quality
+ * Range is [-2;2] - where positive values allow
+ * only pasting with same phase information
+ * Negative values would yield cross phased pasting
+ * When not setting the minimum quality with this function the default
+ * value used is 1.0f
  *
- * Set the TSM scale
  *---------------------------------------------------------------------*/
 
 ivas_error IVAS_DEC_TSM_SetQuality(
-    IVAS_DEC_HANDLE hIvasDec, /* i/o: IVAS decoder handle                                                         */
-    const float quality       /* i  : target TSM quality                                                          */
+    IVAS_DEC_HANDLE hIvasDec, /* i/o: IVAS decoder handle   */
+    const float quality       /* i  : target TSM quality    */
 )
 {
-    ivas_error error;
-
-    error = IVAS_ERR_OK;
-
-    if ( hIvasDec->st_ivas->hDecoderConfig->Opt_tsm == false )
+    if ( !hIvasDec->st_ivas->hDecoderConfig->Opt_tsm )
     {
         return IVAS_ERR_TSM_NOT_ENABLED;
     }
@@ -2536,7 +2544,7 @@ ivas_error IVAS_DEC_TSM_SetQuality(
         hIvasDec->tsm_quality = quality;
     }
 
-    return error;
+    return IVAS_ERR_OK;
 }
 
 
diff --git a/lib_dec/lib_dec.h b/lib_dec/lib_dec.h
index 3d20bee0962fb476b0fe9d38cde1ed3d84f76a11..8390671276fac806adacf6dadb74e1d0cfd35250 100644
--- a/lib_dec/lib_dec.h
+++ b/lib_dec/lib_dec.h
@@ -266,9 +266,10 @@ ivas_error IVAS_DEC_VoIP_SetScale(
     const int16_t scale                         /* i  : TSM scale to set                                                        */
 );
 
+/*! r: error code */
 ivas_error IVAS_DEC_TSM_SetQuality(
-    IVAS_DEC_HANDLE hIvasDec, /* i/o: IVAS decoder handle                                                         */
-	const float quality       /* i  : target TSM quality                                                          */
+    IVAS_DEC_HANDLE hIvasDec,                   /* i/o: IVAS decoder handle                                                     */
+	const float quality                         /* i  : target TSM quality                                                      */
 );
 
 /*! r: error code */