diff --git a/Makefile b/Makefile
index c835017..d2211ef 100644
--- a/Makefile
+++ b/Makefile
@@ -63,7 +63,7 @@ clean:
 	rm -f $(OBJS)
 
 %.o: %.c
-	$(CC) $(CFLAGS) $(CFLAGS_MAIN) $(INC) $(PIC) -c -o $@ $<
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_MAIN) $(INC) $(PIC) -c -o $@ $<
 
 $(LDSO_PATHNAME): $(LOBJS)
 	$(CC) $(LDFLAGS) $(LD_SET_SONAME)$(LDSO_PATHNAME) -o $@ $(LOBJS)