diff --git a/package/sdl_sound/sdl_sound.mk b/package/sdl_sound/sdl_sound.mk
index f95d6bc728..a5d9a26d56 100644
--- a/package/sdl_sound/sdl_sound.mk
+++ b/package/sdl_sound/sdl_sound.mk
@@ -3,10 +3,10 @@
 # sdl_sound addon for SDL
 #
 #############################################################
-SDL_SOUND_VERSION:=1.0.3
-SDL_SOUND_SOURCE:=SDL_sound-$(SDL_SOUND_VERSION).tar.gz
-SDL_SOUND_SITE:=http://icculus.org/SDL_sound/downloads/
-SDL_SOUND_INSTALL_STAGING:=YES
+SDL_SOUND_VERSION = 1.0.3
+SDL_SOUND_SOURCE = SDL_sound-$(SDL_SOUND_VERSION).tar.gz
+SDL_SOUND_SITE = http://icculus.org/SDL_sound/downloads/
+SDL_SOUND_INSTALL_STAGING = YES
 SDL_SOUND_DEPENDENCIES = sdl
 
 ifneq ($(BR2_ENABLE_LOCALE),y)