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--- a/libupnpp/control/avtransport.cxx
+++ b/libupnpp/control/avtransport.cxx
@@ -390,9 +390,11 @@
             iacts |= TPA_Seek;
         } else if (!it->compare("Stop")) {
             iacts |= TPA_Stop;
+        } else if (it->empty()) {
+            continue;
         } else {
-            LOGERR("AVTransport::CTAStringToBits: unknown action "
-                   << *it << endl);
+            LOGERR("AVTransport::CTAStringToBits: unknown action in " <<
+                   actions << " : [" << *it << "]" << endl);
         }
     }
     return 0;