diff --git a/stepmania/src/Makefile.am b/stepmania/src/Makefile.am
index 2dd88911bc..64f551564d 100644
--- a/stepmania/src/Makefile.am
+++ b/stepmania/src/Makefile.am
@@ -10,7 +10,8 @@ else
 AM_CXXFLAGS += -DLINUX -DDATADIR=\"$(datadir)\"
 endif
 
-AM_CXXFLAGS += -O2 -ISDL-1.2.5/include -ISDL_sound-1.0.0
+AM_CXXFLAGS += -O2
+AM_CXXFLAGS += -ISDL-1.2.5/include -ISDL_sound-1.0.0
 AM_CFLAGS   += -O2
 
 # This is a little hacky; we use our own version of SDL and SDL_sound, and I don't