diff --git a/src/iocCore/Makefile.Vx b/src/iocCore/Makefile.Vx
index 2a2f4318a..525e192c6 100644
--- a/src/iocCore/Makefile.Vx
+++ b/src/iocCore/Makefile.Vx
@@ -26,5 +26,6 @@ $(EPICS_VX_IMAGE_SYM): $(VX_IMAGE_SYM)
 iocCore: $(IOC_CORE)
 
 $(IOC_CORE): $(IOC_CORE_OBJS)
+	$(RM) $@
 	$(LINK.c) $@ $?
 	@what $@