diff --git a/src/libCom/Makefile.Unix b/src/libCom/Makefile.Unix
index 6629aceb4..62c679973 100644
--- a/src/libCom/Makefile.Unix
+++ b/src/libCom/Makefile.Unix
@@ -75,7 +75,7 @@ errSymTbl.c errInc.o: errInc.c
 	@$(RM) errInc.o
 	@../blderrSymTbl $(EPICS) $(HOST_ARCH) "$(MAKE)"
 
-envData.c: $(EPICS_BASE)/include/envDefs.h $(EPICS)/config/CONFIG_ENV \
+envData.c: ../envDefs.h $(EPICS)/config/CONFIG_ENV \
 		$(EPICS)/config/CONFIG_SITE_ENV
 	../bldEnvData $(EPICS)