diff --git a/Makefile b/Makefile
index 142feab..f9bdba2 100644
--- a/Makefile
+++ b/Makefile
@@ -33,11 +33,14 @@ ifeq ($(WINDOWS),1)
 GLLIBS      := -lopengl32 -lglu32
 WINDOWSLIBS := -lmingw32
 TARGET      := $(TARGET).exe
+TOPLEVEL    := $(shell cd)
 else
-GLLIBS     := -lGL -lGLU
+GLLIBS      := -lGL -lGLU
+TOPLEVEL    := $(shell pwd)
 endif
 
-export CFLAGS   := $(LUAINCLUDE) $(SDLINCLUDE) $(ODEINCLUDE) -O2 -Wall
+export CPPFLAGS := $(LUAINCLUDE) $(SDLINCLUDE) $(ODEINCLUDE) -I$(TOPLEVEL)
+export CFLAGS   := $(CPPFLAGS) -O2 -Wall
 export CXXFLAGS := $(CFLAGS)
 export LDFLAGS  := $(LUALIBS) $(ODELIBS) $(GLLIBS) $(WINDOWSLIBS) $(SDLLIBS)