diff --git a/deps/libui/win32/areascroll.cpp b/deps/libui/win32/areascroll.cpp
index f18d0ad874..1797063a9d 100644
--- a/deps/libui/win32/areascroll.cpp
+++ b/deps/libui/win32/areascroll.cpp
@@ -100,11 +100,10 @@ static void scroll(uiArea *a, int which, struct scrollParams *p, WPARAM wParam,
 
 static void wheelscroll(uiArea *a, int which, struct scrollParams *p, WPARAM wParam, LPARAM lParam)
 {
-	int delta;
 	int lines;
 	UINT scrollAmount;
+	int delta = GET_WHEEL_DELTA_WPARAM(wParam);
 
-	delta = GET_WHEEL_DELTA_WPARAM(wParam);
 	if (SystemParametersInfoW(p->wheelSPIAction, 0, &scrollAmount, 0) == 0)
 		// TODO use scrollAmount == 3 (for both v and h) instead?
 		logLastError(L"error getting area wheel scroll amount");