diff --git a/src/libCom/osi/os/WIN32/osdThread.c b/src/libCom/osi/os/WIN32/osdThread.c
index 97f384a15..07668308d 100644
--- a/src/libCom/osi/os/WIN32/osdThread.c
+++ b/src/libCom/osi/os/WIN32/osdThread.c
@@ -360,6 +360,15 @@ epicsShareFunc void epicsShareAPI threadGetName (threadId id, char *name, size_t
     *name = '\0';
 }
 
+/*
+ * threadShow ()
+ */
+
+epicsShareFunc void epicsShareAPI threadShow(void)
+{
+    printf("threadShow not implemented\n");
+}
+
 epicsShareFunc threadPrivateId epicsShareAPI threadPrivateCreate ()
 {
     osdThreadPrivate *p = (osdThreadPrivate *) malloc (sizeof (*p));