diff --git a/src/Compiler/CodeGen/IlxGen.fs b/src/Compiler/CodeGen/IlxGen.fs
index 9f4a8b0b9d73..1047dfa4433e 100644
--- a/src/Compiler/CodeGen/IlxGen.fs
+++ b/src/Compiler/CodeGen/IlxGen.fs
@@ -2867,13 +2867,9 @@ and GenExprPreSteps (cenv: cenv) (cgbuf: CodeGenBuffer) eenv expr sequel =
                 None
 
         match lowering with
-        | Some(LowerComputedCollectionExpressions.ComputedCollectionExprLowering.Expr initExpr) ->
+        | Some initExpr ->
             GenExpr cenv cgbuf eenv initExpr sequel
             true
-        | Some(LowerComputedCollectionExpressions.ComputedCollectionExprLowering.Either(branch1, branch2)) ->
-            GenExpr cenv cgbuf eenv branch1 (sequelIgnoreEndScopes sequel)
-            GenExpr cenv cgbuf eenv branch2 sequel
-            true
         | None ->
 
             let lowering =