diff --git a/RtAudio.cpp b/RtAudio.cpp
index 00d63f0c..f72c8998 100644
--- a/RtAudio.cpp
+++ b/RtAudio.cpp
@@ -1944,7 +1944,9 @@ struct JackHandle {
     :client(0), drainCounter(0), internalDrain(false) { ports[0] = 0; ports[1] = 0; xrun[0] = false; xrun[1] = false; }
 };
 
+#if !defined(__RTAUDIO_DEBUG__)
 static void jackSilentError( const char * ) {};
+#endif
 
 RtApiJack :: RtApiJack()
     :shouldAutoconnect_(true) {