Index: src/audiofilters/gsm.c
--- src/audiofilters/gsm.c.orig
+++ src/audiofilters/gsm.c
@@ -21,11 +21,7 @@
 #include <bctoolbox/defs.h>
 
 #include "mediastreamer2/msfilter.h"
-#ifdef GSM_USE_BUILD_INTERFACE
 #include <gsm.h>
-#else
-#include <gsm/gsm.h>
-#endif
 
 #ifdef _MSC_VER
 #include <malloc.h>
