diff --git a/src/managers/input/InputManager.cpp b/src/managers/input/InputManager.cpp
index a6dd6424..a388fba9 100644
--- a/src/managers/input/InputManager.cpp
+++ b/src/managers/input/InputManager.cpp
@@ -50,7 +50,7 @@ void CInputManager::mouseMoveUnified(uint32_t time, bool refocus) {
             const auto CONSTRAINTPOS = CONSTRAINTWINDOW->m_bIsX11 ? Vector2D(CONSTRAINTWINDOW->m_uSurface.xwayland->x, CONSTRAINTWINDOW->m_uSurface.xwayland->y) : CONSTRAINTWINDOW->m_vRealPosition.vec();
             const auto CONSTRAINTSIZE = CONSTRAINTWINDOW->m_bIsX11 ? Vector2D(CONSTRAINTWINDOW->m_uSurface.xwayland->width, CONSTRAINTWINDOW->m_uSurface.xwayland->height) : CONSTRAINTWINDOW->m_vRealSize.vec();
 
-            if (!VECINRECT(mouseCoords, CONSTRAINTPOS.x, CONSTRAINTPOS.y, CONSTRAINTPOS.x + CONSTRAINTSIZE.x, CONSTRAINTPOS.y + CONSTRAINTSIZE.y)) {
+            if (!VECINRECT(mouseCoords, CONSTRAINTPOS.x, CONSTRAINTPOS.y, CONSTRAINTPOS.x + CONSTRAINTSIZE.x - 1.0, CONSTRAINTPOS.y + CONSTRAINTSIZE.y - 1.0)) {
                 if (g_pCompositor->m_sSeat.mouse->constraintActive) {
                     Vector2D newConstrainedCoords = mouseCoords;