diff --git a/compiler/nativeGen/AsmCodeGen.lhs b/compiler/nativeGen/AsmCodeGen.lhs
index b818b012c7bd6505bf6e49bd2c4e81fbd9295d6f..a8fd604cc1c9a6fc76d1aae9f7be0484e8c93134 100644
--- a/compiler/nativeGen/AsmCodeGen.lhs
+++ b/compiler/nativeGen/AsmCodeGen.lhs
@@ -948,7 +948,8 @@ cmmExprConFold referenceKind expr = do
     dflags <- getDynFlags
     -- Skip constant folding if new code generator is running
     -- (this optimization is done in Hoopl)
-    let expr' = if dopt Opt_TryNewCodeGen dflags
+    -- SDM: re-enabled for now, while cmmRewriteAssignments is turned off
+    let expr' = if False -- dopt Opt_TryNewCodeGen dflags
                     then expr
                     else cmmExprCon (targetPlatform dflags) expr
     cmmExprNative referenceKind expr'