diff --git a/programs/winefile/winefile.c b/programs/winefile/winefile.c
index 27079bbcf84..044a399a82f 100644
--- a/programs/winefile/winefile.c
+++ b/programs/winefile/winefile.c
@@ -1923,6 +1923,7 @@ static void frame_get_clientspace(HWND hwnd, PRECT prect)
 	else {
 		WINDOWPLACEMENT wp;
 
+                wp.length = sizeof(wp);
 		GetWindowPlacement(hwnd, &wp);
 
 		prect->left = prect->top = 0;