diff --git a/lib_com/options.h b/lib_com/options.h
index 8d8f4d3f12e560d276e40944b3930a1bc5ddc062..747c9de3a35f3ae1ccd630ae7014ff1d42d90bae 100755
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -169,7 +169,8 @@
 #define BE_FIX_567_DOUBLE_STEREO_DMX                          /* NTT: Fix formal issues */   
 #define NONBE_FIX_567_DOUBLE_STEREO_DMX                       /* Orange: Double-precision replaced by single-precision */   
 #define NONBE_FIX_947_STEREO_DMX_EVS_POC                      /* Orange: Fix clicks on POC */  
-#define NONBE_FIX_947_STEREO_DMX_EVS_PHA                      /* Orange: Fix issues on PHA */                                                                                        
+#define NONBE_FIX_947_STEREO_DMX_EVS_PHA                      /* Orange: Fix issues on PHA */     
+#define NONBE_FIX_975_JBM_USAN                                /* FhG: Fix issue #975, USAN in JBM decoding ad 13.2kbps */
 #define NONBE_FIX_982_OMASA_DELAY_COMP_5MS                    /* FhG : issue #982 : 5ms and 20ms output different for OMASA */
 /* ##################### End NON-BE switches ########################### */
 
diff --git a/lib_dec/lib_dec.c b/lib_dec/lib_dec.c
index d6a917bb09945f63f5ce9ff7e4494c80f951b9c7..94468ef6bf0edbd40d43e7eb8680f311fd50f78d 100644
--- a/lib_dec/lib_dec.c
+++ b/lib_dec/lib_dec.c
@@ -2333,8 +2333,18 @@ ivas_error IVAS_DEC_VoIP_FeedFrame(
         return IVAS_ERR_INVALID_BITSTREAM;
     }
 
-    /* check if frame contains a partial copy and get its offset */
-    evs_dec_previewFrame( au, auSize, &partialCopyFrameType, &partialCopyOffset );
+#ifdef NONBE_FIX_975_JBM_USAN
+    partialCopyFrameType = 0;
+    partialCopyOffset = 0;
+
+    if ( hIvasDec->mode == IVAS_DEC_MODE_EVS )
+    {
+#endif
+        /* check if frame contains a partial copy and get its offset */
+        evs_dec_previewFrame( au, auSize, &partialCopyFrameType, &partialCopyOffset );
+#ifdef NONBE_FIX_975_JBM_USAN
+    }
+#endif
 
     /* create data unit for primary copy in the frame */
     dataUnit = JB4_AllocDataUnit( hIvasDec->hVoIP->hJBM );