diff --git a/Makefile b/Makefile
index efd305ab35..8c4487dd0c 100644
--- a/Makefile
+++ b/Makefile
@@ -3284,7 +3284,7 @@ HCC = $(HCO:hco=hcc)
 	@echo '#include "git-compat-util.h"' >$@
 	@echo '#include "$<"' >>$@
 
-$(HCO): %.hco: %.hcc FORCE
+$(HCO): %.hco: %.hcc $(GENERATED_H) FORCE
 	$(QUIET_HDR)$(CC) $(ALL_CFLAGS) -o /dev/null -c -xc $<
 
 .PHONY: hdr-check $(HCO)