--- a/GccUnix.mak
+++ b/GccUnix.mak
@@ -30,7 +30,7 @@ include gccmod.inc
 
 #.c.o:
 #	$(CC) -c $(inc_dirs) $(c_flags) -o $(OUTD)/$*.o $<
-$(OUTD)/%.o: src/%.c
+$(OUTD)/%.o: src/%.c | $(OUTD)
 	$(CC) -c $(inc_dirs) $(c_flags) -o $(OUTD)/$*.o $<
 
 all:  $(OUTD) $(OUTD)/$(TARGET1)