diff --git a/stepmania/src/arch/MovieTexture/MovieTexture_Theora.cpp b/stepmania/src/arch/MovieTexture/MovieTexture_Theora.cpp
index 17be35bf2e..3eef4ade5c 100644
--- a/stepmania/src/arch/MovieTexture/MovieTexture_Theora.cpp
+++ b/stepmania/src/arch/MovieTexture/MovieTexture_Theora.cpp
@@ -271,7 +271,7 @@ float MovieDecoder_Theora::GetTimestamp() const
 
 float MovieDecoder_Theora::GetFrameDuration() const
 {
-	return (float) m_TheoraInfo.fps_numerator / m_TheoraInfo.fps_denominator;
+	return (float) m_TheoraInfo.fps_denominator / m_TheoraInfo.fps_numerator;
 }
 
 bool MovieDecoder_Theora::SkippableFrame() const