Index: cmake/FindGSM.cmake
--- cmake/FindGSM.cmake.orig
+++ cmake/FindGSM.cmake
@@ -58,7 +58,7 @@ else()
 	set(_GSM_ROOT_PATHS ${CMAKE_INSTALL_PREFIX})
 
 	find_path(_GSM_INCLUDE_DIRS
-		NAMES gsm/gsm.h
+		NAMES gsm.h
 		HINTS ${_GSM_ROOT_PATHS}
 		PATH_SUFFIXES include
 	)
