diff --git a/Makefile b/Makefile
index 47a4782..b75da64 100644
--- a/Makefile
+++ b/Makefile
@@ -35,17 +35,23 @@ else
 GLLIBS     := -lGL -lGLU
 endif
 
-CPPFLAGS := $(LUAINCLUDE) $(SDLINCLUDE) $(ODEINCLUDE)
+CFLAGS   := $(LUAINCLUDE) $(SDLINCLUDE) $(ODEINCLUDE)
+CXXFLAGS := $(CFLAGS)
 LDFLAGS  := $(LUALIBS) $(ODELIBS) $(GLLIBS) $(WINDOWSLIBS) $(SDLLIBS)
 
 all: $(TARGET)
 
-$(TARGET): $(OBJS) wfobj/WFObj.o
+$(TARGET): $(OBJS) wfobj/WFObj.o OdeWorld/OdeWorld.o
 	$(CXX) -o $@ $^ $(LDFLAGS)
 
+.PHONY: wfobj/WFObj.o
 wfobj/WFObj.o:
 	$(MAKE) -C wfobj
 
+.PHONY: OdeWorld/OdeWorld.o
+OdeWorld/OdeWorld.o:
+	$(MAKE) -C OdeWorld
+
 %.o: %.c
 	$(CC) -c -o $@ $(CPPFLAGS) $(CFLAGS) $<