diff --git a/imgui.cpp b/imgui.cpp
index 961fa14..a09bb8c 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -5516,7 +5516,7 @@
         g.NavLayer = 0;
         if (window && g.NavDisableMouseHover)
             g.NavMousePosDirty = true;
-        window->NavRectRel[0].Min = window->NavRectRel[1].Max = window ? (window->DC.CursorStartPos - window->Pos) : ImVec2(0,0);
+        window->NavRectRel[0].Min = window->NavRectRel[0].Max = window ? (window->DC.CursorStartPos - window->Pos) : ImVec2(0,0);
         g.NavWindow = window;
     }