diff --git a/stepmania/src/RageSound.cpp b/stepmania/src/RageSound.cpp
index 2855f3c015..90a5e4458a 100644
--- a/stepmania/src/RageSound.cpp
+++ b/stepmania/src/RageSound.cpp
@@ -136,7 +136,7 @@ void RageSound::Unload()
 	databuf.clear();
 }
 
-bool RageSound::IsLoaded()
+bool RageSound::IsLoaded() const
 {
 	return Sample != NULL;
 }
diff --git a/stepmania/src/RageSound.h b/stepmania/src/RageSound.h
index bdd479a44b..43110aeeab 100644
--- a/stepmania/src/RageSound.h
+++ b/stepmania/src/RageSound.h
@@ -97,7 +97,7 @@ public:
 	 * be set up only if needed.  Doesn't fail. */
 	void LoadSoundReader( SoundReader *pSound );
 	void Unload();
-	bool IsLoaded();
+	bool IsLoaded() const;
 
 	void StartPlaying();
 	void StopPlaying();