--- a/configure.ac	2015-07-12 17:31:49.673817375 -0400
+++ b/configure.ac	2015-07-12 17:32:18.567700880 -0400
@@ -54,7 +54,7 @@
   AC_DEFINE(USE_MALLOC_WRAPPER, 1, Define to use a malloc wrapper)
   CFLAGS="-Wall -Werror -pedantic -Wextra -std=gnu99 -g $CFLAGS"
 else
-  CFLAGS="-O3 -Wall -Wextra -std=gnu99 $CFLAGS"
+  CFLAGS="$CFLAGS -Wall -Wextra -std=gnu99"
 fi
 
 dnl  Check for SDL_mixer