diff --git a/boxes/__init__.py b/boxes/__init__.py
index bb77ba1..a0f441e 100755
--- a/boxes/__init__.py
+++ b/boxes/__init__.py
@@ -957,11 +957,17 @@ class Boxes:
 
         self.cc(callback, 0, y=bottomwidth+self.burn)
         bottom(x/2.0-r)
-        for i, l in zip(range(4), (y, x, y, 0)):
-            self.flexEdge(c4, h+topwidth+bottomwidth)
-            self.cc(callback, i+1, y=bottomwidth+self.burn)
-            if i < 3:
-                bottom(l-2*r)
+        if (y-2*r) < 1E-3:
+            self.flexEdge(2*c4, h+topwidth+bottomwidth)
+            self.cc(callback, 2, y=bottomwidth+self.burn)
+            bottom(x-2*r)
+            self.flexEdge(2*c4, h+topwidth+bottomwidth)
+        else:
+            for i, l in zip(range(4), (y, x, y, 0)):
+                self.flexEdge(c4, h+topwidth+bottomwidth)
+                self.cc(callback, i+1, y=bottomwidth+self.burn)
+                if i < 3:
+                    bottom(l-2*r)
         bottom(x/2.0-r)
 
         self.corner(90)