diff --git a/fxemu.cpp b/fxemu.cpp
index 09761a3e..4c01a481 100644
--- a/fxemu.cpp
+++ b/fxemu.cpp
@@ -213,8 +213,9 @@ void S9xInitSuperFX (void)
 
 void S9xResetSuperFX (void)
 {
-	// FIXME: Snes9x can't execute CPU and SuperFX at a time. Don't ask me what is 0.417 :P
-	SuperFX.speedPerLine = (uint32) (0.417 * 10.5e6 * ((1.0 / (float) Memory.ROMFramesPerSecond) / ((float) (Timings.V_Max))));
+	// FIXME: Snes9x only runs the SuperFX at the end of every line.
+	// 5823405 is a magic number that seems to work for most games.
+	SuperFX.speedPerLine = (uint32) (5823405 * ((1.0 / (float) Memory.ROMFramesPerSecond) / ((float) (Timings.V_Max))));
 	SuperFX.oneLineDone = FALSE;
 	SuperFX.vFlags = 0;
 	CPU.IRQExternal = FALSE;