diff --git a/src/makeBaseApp/top/config/RULES.Vx b/src/makeBaseApp/top/config/RULES.Vx
index 308a2ef71..bdc2f46b0 100644
--- a/src/makeBaseApp/top/config/RULES.Vx
+++ b/src/makeBaseApp/top/config/RULES.Vx
@@ -7,3 +7,8 @@ inc:: $(INSTALL_INCREC)
 #Jeff says this turned off all dependency checking
 #????? What to do????
 #$(EPICS_BASE_BIN)/* : ;
+
+
+# Library should be rebuilt because LIBOBJS may have changed.
+$(LIBNAME): ../Makefile
+