diff --git a/ir.py b/ir.py
index 141d8b5..034e35e 100644
--- a/ir.py
+++ b/ir.py
@@ -278,7 +278,7 @@ class Switch:
 						if n in self.branches:
 							return Some(self.branches[n])
 						else:
-							return None
+							return Some(self.fallback)
 				raise Exception('Attempted to switch on non-integer value')
 		raise Exception('Unreachable')