diff --git a/src/Instructions/IntInstructions.hs b/src/Instructions/IntInstructions.hs
index 55ccdb1..2a1c7b6 100644
--- a/src/Instructions/IntInstructions.hs
+++ b/src/Instructions/IntInstructions.hs
@@ -82,5 +82,5 @@ instructionIntStackDepth state = instructionStackDepth state int
 
 -- int specific
 instructionIntYank :: State -> State
-instructionIntYank state@(State {_int = index : i2 : is}) = 
+instructionIntYank state@(State {_int = index : i2 : is}) = undefined
 instructionIntYank state = state