--- a/cmake_modules/FindSDL2_mixer.cmake	Tue Apr 25 21:00:44 2017 +0200
+++ b/cmake_modules/FindSDL2_mixer.cmake	Sat Apr 29 23:45:14 2017 +0200
@@ -33,8 +33,7 @@
 #  License text for the above reference.)
 
 if(NOT SDL2_MIXER_INCLUDE_DIR AND SDL2MIXER_INCLUDE_DIR)
-  set(SDL2_MIXER_INCLUDE_DIR ${SDL2MIXER_INCLUDE_DIR} CACHE PATH "directory cache
-entry initialized from old variable name")
+  set(SDL2_MIXER_INCLUDE_DIR ${SDL2MIXER_INCLUDE_DIR} CACHE PATH "directory cache entry initialized from old variable name")
 endif()
 find_path(SDL2_MIXER_INCLUDE_DIR SDL_mixer.h
   HINTS
@@ -55,13 +54,13 @@
   PATH_SUFFIXES lib
 )
 
-if(SDL2_MIXER_INCLUDE_DIR AND EXISTS "${SDL2_MIXER_INCLUDE_DIR}/SDL2_mixer.h")
-  file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL2_mixer.h" SDL2_MIXER_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL2_MIXER_MAJOR_VERSION[ \t]+[0-9]+$")
-  file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL2_mixer.h" SDL2_MIXER_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL2_MIXER_MINOR_VERSION[ \t]+[0-9]+$")
-  file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL2_mixer.h" SDL2_MIXER_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL2_MIXER_PATCHLEVEL[ \t]+[0-9]+$")
-  string(REGEX REPLACE "^#define[ \t]+SDL2_MIXER_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_MAJOR "${SDL2_MIXER_VERSION_MAJOR_LINE}")
-  string(REGEX REPLACE "^#define[ \t]+SDL2_MIXER_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_MINOR "${SDL2_MIXER_VERSION_MINOR_LINE}")
-  string(REGEX REPLACE "^#define[ \t]+SDL2_MIXER_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_PATCH "${SDL2_MIXER_VERSION_PATCH_LINE}")
+if(SDL2_MIXER_INCLUDE_DIR AND EXISTS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h")
+  file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL2_MIXER_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL2_MIXER_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL2_MIXER_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+[0-9]+$")
+  string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_MAJOR "${SDL2_MIXER_VERSION_MAJOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_MINOR "${SDL2_MIXER_VERSION_MINOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_PATCH "${SDL2_MIXER_VERSION_PATCH_LINE}")
   set(SDL2_MIXER_VERSION_STRING ${SDL2_MIXER_VERSION_MAJOR}.${SDL2_MIXER_VERSION_MINOR}.${SDL2_MIXER_VERSION_PATCH})
   unset(SDL2_MIXER_VERSION_MAJOR_LINE)
   unset(SDL2_MIXER_VERSION_MINOR_LINE)
@@ -87,8 +86,8 @@
                                   VERSION_VAR SDL2_MIXER_VERSION_STRING)
 
 # for backward compatiblity
-set(SDL2MIXER_LIBRARY ${SDL2_MIXER_LIBRARIES})
-set(SDL2MIXER_INCLUDE_DIR ${SDL2_MIXER_INCLUDE_DIRS})
-set(SDL2MIXER_FOUND ${SDL2_MIXER_FOUND})
+set(SDLMIXER_LIBRARY ${SDL2_MIXER_LIBRARIES})
+set(SDLMIXER_INCLUDE_DIR ${SDL2_MIXER_INCLUDE_DIRS})
+set(SDLMIXER_FOUND ${SDL2_MIXER_FOUND})
 
 mark_as_advanced(SDL2_MIXER_LIBRARY SDL2_MIXER_INCLUDE_DIR)