diff --git a/src/Lean/Meta/InferType.lean b/src/Lean/Meta/InferType.lean
index 5ff735e9da17..82a447c0d393 100644
--- a/src/Lean/Meta/InferType.lean
+++ b/src/Lean/Meta/InferType.lean
@@ -187,7 +187,7 @@ because it overrides unrelated configurations.
 @[inline] def withInferTypeConfig (x : MetaM α) : MetaM α :=
   withAtLeastTransparency .default do
     let cfg ← getConfig
-    if cfg.beta && cfg.iota && cfg.zeta && cfg.zetaDelta && cfg.proj != .no then
+    if cfg.beta && cfg.iota && cfg.zeta && cfg.zetaDelta && cfg.proj == .yesWithDelta then
       x
     else
       withConfig (fun cfg => { cfg with beta := true, iota := true, zeta := true, zetaDelta := true, proj := .yesWithDelta }) x