diff --git a/src/sound_manager.cpp b/src/sound_manager.cpp
index 96e131ad1..02bde6ea3 100644
--- a/src/sound_manager.cpp
+++ b/src/sound_manager.cpp
@@ -179,6 +179,7 @@ void SoundManager::playMusic(const char* filename)
 
 #endif
         if(m_current_music == NULL)	// no support for file
+            fprintf(stderr, "WARNING: music file %s format not recognized.\n", filename);
             return;
 
             if((m_current_music->load(filename)) == false)