diff --git a/sc2/configure.ac b/sc2/configure.ac
index 03b0c36a4..bb6c201bc 100644
--- a/sc2/configure.ac
+++ b/sc2/configure.ac
@@ -27,8 +27,8 @@ AM_MAINTAINER_MODE
 
 # Configurables
 
-CFLAGS="$CFLAGS -g -O2 -DHAVE_OPENGL -DGFXMODULE_SDL -DSOUNDMODULE_SDL"
-CPPFLAGS="$CPPFLAGS -g -O2 -DHAVE_OPENGL -DGFXMODULE_SDL -DSOUNDMODULE_SDL"
+CFLAGS="$CFLAGS -g -DHAVE_OPENGL -DGFXMODULE_SDL -DSOUNDMODULE_SDL"
+CPPFLAGS="$CPPFLAGS -g -DHAVE_OPENGL -DGFXMODULE_SDL -DSOUNDMODULE_SDL"
 
 # These defines seem to be missing, and they are added here as a workaround.