diff -ruN MPlayer-1.2-orig/configure MPlayer-1.2/configure
--- MPlayer-1.2-orig/configure	2015-10-02 15:29:04.000000000 -0500
+++ MPlayer-1.2/configure	2015-10-10 09:41:31.000000000 -0500
@@ -6587,7 +6587,7 @@
 echocheck "libgsm"
 if test "$_libgsm" = auto ; then
   _libgsm=no
-  statement_check gsm/gsm.h 'gsm_create()' -lgsm && _libgsm=yes
+  statement_check gsm.h 'gsm_create()' -lgsm && _libgsm=yes
 fi
 if test "$_libgsm" = yes ; then
   def_libgsm='#define CONFIG_LIBGSM 1'
diff -ruN MPlayer-1.2-orig/ffmpeg/libavcodec/libgsmdec.c MPlayer-1.2/ffmpeg/libavcodec/libgsmdec.c
--- MPlayer-1.2-orig/ffmpeg/libavcodec/libgsmdec.c	2015-10-03 16:12:06.000000000 -0500
+++ MPlayer-1.2/ffmpeg/libavcodec/libgsmdec.c	2015-10-10 13:47:03.000000000 -0500
@@ -31,7 +31,7 @@
 #if HAVE_GSM_H
 #include <gsm.h>
 #else
-#include <gsm/gsm.h>
+#include <gsm.h>
 #endif
 
 #include "libavutil/channel_layout.h"
diff -ruN MPlayer-1.2-orig/ffmpeg/libavcodec/libgsmenc.c MPlayer-1.2/ffmpeg/libavcodec/libgsmenc.c
--- MPlayer-1.2-orig/ffmpeg/libavcodec/libgsmenc.c	2015-10-03 16:12:06.000000000 -0500
+++ MPlayer-1.2/ffmpeg/libavcodec/libgsmenc.c	2015-10-10 13:47:07.000000000 -0500
@@ -31,7 +31,7 @@
 #if HAVE_GSM_H
 #include <gsm.h>
 #else
-#include <gsm/gsm.h>
+#include <gsm.h>
 #endif
 
 #include "libavutil/common.h"