diff --git a/simgear/debug/logdelta.cxx b/simgear/debug/logdelta.cxx
index 00630d4a..ebe470d1 100644
--- a/simgear/debug/logdelta.cxx
+++ b/simgear/debug/logdelta.cxx
@@ -62,9 +62,6 @@ struct logDelta
         //
         const char* items = getenv("SG_LOG_DELTAS");
         if (!items) {
-            std::cerr << __FILE__ << ":" << __LINE__ << ": "
-                    << "$SG_LOG_DELTAS is not set"
-                    << "\n";
             return;
         }