diff --git a/stepmania/src/arch/Sound/DSoundHelpers.cpp b/stepmania/src/arch/Sound/DSoundHelpers.cpp
index 87189306f0..1c6f32b319 100644
--- a/stepmania/src/arch/Sound/DSoundHelpers.cpp
+++ b/stepmania/src/arch/Sound/DSoundHelpers.cpp
@@ -356,6 +356,10 @@ void DSoundBuf::CheckUnderrun( int cursorstart, int cursorend, int chunksize )
 	if( buffer_bytes_filled >= buffersize )
 		return;
 
+	/* If nothing is expected to be filled, we can't underrun. */
+	if( cursorstart == cursorend )
+		return;
+
 	/* If there's no data in the buffer at all, then we've completely underrun.  Our
 	 * write cursor is irrelevant; we might be unrelated to the play position completely.
 	 * Realign. */