diff --git a/gzdoom-system-gme.patch b/gzdoom-system-gme.patch
index 8283e69..cbdb722 100644
--- a/gzdoom-system-gme.patch
+++ b/gzdoom-system-gme.patch
@@ -1,3 +1,8 @@
+From: Jan Engelhardt <jengelh@inai.de>
+Date: 2019-12-18 23:10:30.098185171 +0100
+
+Use GME system libraries instead of bundled code.
+
 ---
  CMakeLists.txt                  |   13 ++++---------
  libraries/zmusic/CMakeLists.txt |    2 +-
@@ -35,7 +40,7 @@ Index: gzdoom-g4.2.4/CMakeLists.txt
  
  if( GME_FOUND AND NOT FORCE_INTERNAL_GME )
 -	message( STATUS "Using system gme library, includes found at ${GME_INCLUDE_DIR}" )
-+	message( STATUS "Using system gme library, includes found at ${GME_INCLUDE_DIRS}" )
++	message( STATUS "Using system gme library, includes found at ${GME_INCLUDEDIR}" )
  else()
  	message( STATUS "Using internal gme library" )
  	# Use MAME as it's balanced emulator: well-accurate, but doesn't eats lot of CPU
@@ -43,7 +48,7 @@ Index: gzdoom-g4.2.4/CMakeLists.txt
  	set( GME_YM2612_EMU "MAME" )
  	add_subdirectory( libraries/game-music-emu )
 -	set( GME_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/libraries/game-music-emu" )
-+	set( GME_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/libraries/game-music-emu" )
++	set( GME_INCLUDEDIR "${CMAKE_CURRENT_SOURCE_DIR}/libraries/game-music-emu" )
  	set( GME_LIBRARIES gme )
  endif()