diff --git a/source/input.cpp b/source/input.cpp
index 46a59d5..17ae0e6 100644
--- a/source/input.cpp
+++ b/source/input.cpp
@@ -383,7 +383,7 @@ static void decodepad (int chan)
 {
 	int i, offset;
 	double angle;
-	static const double THRES = cos(67.5);
+	static const double THRES = 0.38268343236508984; // cos(67.5)
 
 	s8 pad_x = userInput[chan].pad.stickX;
 	s8 pad_y = userInput[chan].pad.stickY;