diff --git a/compiler/rustc_metadata/src/rmeta/encoder.rs b/compiler/rustc_metadata/src/rmeta/encoder.rs
index 2774e817d3b..c0cd82eeab8 100644
--- a/compiler/rustc_metadata/src/rmeta/encoder.rs
+++ b/compiler/rustc_metadata/src/rmeta/encoder.rs
@@ -1138,9 +1138,7 @@ fn encode_optimized_mir(&mut self, def_id: LocalDefId) {
 
     fn encode_promoted_mir(&mut self, def_id: LocalDefId) {
         debug!("EncodeContext::encode_promoted_mir({:?})", def_id);
-        if self.tcx.mir_keys(LOCAL_CRATE).contains(&def_id) {
-            record!(self.tables.promoted_mir[def_id.to_def_id()] <- self.tcx.promoted_mir(def_id));
-        }
+        record!(self.tables.promoted_mir[def_id.to_def_id()] <- self.tcx.promoted_mir(def_id));
     }
 
     // Encodes the inherent implementations of a structure, enumeration, or trait.