diff --git a/source/core/gameinput.cpp b/source/core/gameinput.cpp
index d962f8d44..f3ae00708 100644
--- a/source/core/gameinput.cpp
+++ b/source/core/gameinput.cpp
@@ -138,7 +138,7 @@ void processMovement(InputPacket* const currInput, InputPacket* const inputBuffe
 
 	// process player pitch input.
 	if (!(inputBuffer->actions & SB_AIMMODE))
-		currInput->horz += hidInput->mouseturny - hidInput->dpitch * hidspeed * scaleAdjustf;
+		currInput->horz += hidInput->mouseturny + hidInput->dpitch * hidspeed * scaleAdjustf;
 	else
 		currInput->fvel -= hidInput->mousemovey + hidInput->dpitch * keymove * scaleAdjustf;