diff --git a/modules/libcom/test/osiSockTest.c b/modules/libcom/test/osiSockTest.c
index f2adb41cd..e99b9a8c9 100644
--- a/modules/libcom/test/osiSockTest.c
+++ b/modules/libcom/test/osiSockTest.c
@@ -325,7 +325,7 @@ void udpSockFanoutTestIface(const osiSockAddr* addr)
     /* test to see if send is possible (not EPERM) */
     ret = sendto(sender, buf.bytes, sizeof(buf.bytes), 0, &addr->sa, sizeof(*addr));
     if(ret!=(int)sizeof(buf.bytes)) {
-        testDiag("test sendto() error %d (%d)", ret, (int)SOCKERRNO);
+        testDiag("test sendto() error %d (%d): %s", ret, (int)SOCKERRNO, strerror(err));
         goto cleanup;
     }