diff --git a/config/RULES.Host b/config/RULES.Host
index 791d67954..9746493bc 100644
--- a/config/RULES.Host
+++ b/config/RULES.Host
@@ -633,7 +633,7 @@ endif
 %.db: ../%.edf
 	$(E2DB) $(E2DB_SYSFLAGS) $(E2DB_FLAGS) $<
 
-%.edf: ../%.sch
+%.edf: ../%.sch $(DEPSCHS)
 	@if [ ! -f cad.rc -a -r ../cad.rc ] ; then ln -s ../cad.rc ; fi
 	$(SCH2EDIF) $(SCH2EDIF_SYSFLAGS) $(SCH2EDIF_FLAGS) $<