--- mediastreamer2-4.5.22/src/audiofilters/gsm.c.orig	2021-06-24 23:55:04.000000000 +0200
+++ mediastreamer2-4.5.22/src/audiofilters/gsm.c	2021-07-09 20:30:36.320023832 +0200
@@ -18,7 +18,7 @@
  */
 
 #include "mediastreamer2/msfilter.h"
-#include <gsm/gsm.h>
+#include <gsm.h>
 
 #ifdef _MSC_VER
 #include <malloc.h>
#--- mediastreamer2-4.5.22/cmake/FindGSM.cmake.orig	2021-06-24 23:55:04.000000000 +0200
#+++ mediastreamer2-4.5.22/cmake/FindGSM.cmake	2021-07-09 20:32:19.826129758 +0200
#@@ -37,6 +37,15 @@ find_path(GSM_INCLUDE_DIRS
# )
# if(GSM_INCLUDE_DIRS)
# 	set(HAVE_GSM_GSM_H 1)
#+else()
#+	find_path(GSM_INCLUDE_DIRS
#+		NAMES gsm.h
#+		HINTS _GSM_ROOT_PATHS
#+		PATH_SUFFIXES include
#+	)
#+	if(GSM_INCLUDE_DIRS)
#+		set(HAVE_GSM_H 1)
#+	endif()
# endif()
# 
# find_library(GSM_LIBRARIES
--- mediastreamer2-4.5.22/cmake/FindGSM.cmake.orig	2021-06-24 23:55:04.000000000 +0200
+++ mediastreamer2-4.5.22/cmake/FindGSM.cmake	2021-07-09 20:42:12.959583145 +0200
@@ -31,12 +31,12 @@ set(_GSM_ROOT_PATHS
 )
 
 find_path(GSM_INCLUDE_DIRS
-	NAMES gsm/gsm.h
+	NAMES gsm.h
 	HINTS _GSM_ROOT_PATHS
-	PATH_SUFFIXES include
+	PATH_SUFFIXES include/gsm include
 )
 if(GSM_INCLUDE_DIRS)
-	set(HAVE_GSM_GSM_H 1)
+	set(HAVE_GSM_H 1)
 endif()
 
 find_library(GSM_LIBRARIES
@@ -48,7 +48,7 @@ find_library(GSM_LIBRARIES
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(GSM
 	DEFAULT_MSG
-	GSM_INCLUDE_DIRS GSM_LIBRARIES HAVE_GSM_GSM_H
+	GSM_INCLUDE_DIRS GSM_LIBRARIES HAVE_GSM_H
 )
 
-mark_as_advanced(GSM_INCLUDE_DIRS GSM_LIBRARIES HAVE_GSM_GSM_H)
+mark_as_advanced(GSM_INCLUDE_DIRS GSM_LIBRARIES HAVE_GSM_H)