diff --git a/lib/gears/geometry.lua b/lib/gears/geometry.lua
index a5144356..70628888 100644
--- a/lib/gears/geometry.lua
+++ b/lib/gears/geometry.lua
@@ -176,6 +176,9 @@ function gears.geometry.rectangle.get_intersection(a, b)
     g.y = math.max(a.y, b.y)
     g.width = math.min(a.x + a.width, b.x + b.width) - g.x
     g.height = math.min(a.y + a.height, b.y + b.height) - g.y
+    if g.width <= 0 or g.height <= 0 then
+        g.width, g.height = 0, 0
+    end
     return g
 end