diff -Naur linphone-2.0.0-org/mediastreamer2/configure.ac linphone-2.0.0-gsm/mediastreamer2/configure.ac
--- linphone-2.0.0-org/mediastreamer2/configure.ac	2007-11-15 14:18:19.000000000 +0100
+++ linphone-2.0.0-gsm/mediastreamer2/configure.ac	2007-11-21 18:40:20.000000000 +0100
@@ -290,7 +290,7 @@
 		  [ gsmdir=${withval}],[ gsmdir=/usr ])
 
 MS_CHECK_DEP([gsm codec],[GSM],[${gsmdir}/include],
-	[${gsmdir}/lib],[gsm.h],[gsm],[gsm_create])
+	[${gsmdir}/lib],[gsm/gsm.h],[gsm],[gsm_create])
 
 if test "$GSM_found" = "yes" ; then
 	build_gsm=yes