diff --git a/src/iocCore/Makefile.Vx b/src/iocCore/Makefile.Vx
index 34d6d8bad..433e69cb1 100644
--- a/src/iocCore/Makefile.Vx
+++ b/src/iocCore/Makefile.Vx
@@ -24,5 +24,7 @@ include $(TOP)/config/RULES.Vx
 
 iocCore: $(IOC_CORE_OBJS)
 	$(LINK.c) $@ $(IOC_CORE_OBJS)
+ifneq ($(HOST_ARCH),WIN32)
 	@what $@
+endif