diff --git a/packages/babel-parser/src/plugins/flow.js b/packages/babel-parser/src/plugins/flow.js
index 72ed92b6c276..394013c01a19 100644
--- a/packages/babel-parser/src/plugins/flow.js
+++ b/packages/babel-parser/src/plugins/flow.js
@@ -2266,9 +2266,10 @@ export default (superClass: Class<Parser>): Class<Parser> =>
 
     parsePropertyName(
       node: N.ObjectOrClassMember | N.ClassMember | N.TsNamedTypeElementBase,
+      isPattern: boolean,
     ): N.Identifier {
       const variance = this.flowParseVariance();
-      const key = super.parsePropertyName(node);
+      const key = super.parsePropertyName(node, isPattern);
       // $FlowIgnore ("variance" not defined on TsNamedTypeElementBase)
       node.variance = variance;
       return key;
diff --git a/packages/babel-parser/src/plugins/typescript/index.js b/packages/babel-parser/src/plugins/typescript/index.js
index 0c740b2c9bdd..47759a8dcede 100644
--- a/packages/babel-parser/src/plugins/typescript/index.js
+++ b/packages/babel-parser/src/plugins/typescript/index.js
@@ -507,7 +507,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
         return idx;
       }
 
-      this.parsePropertyName(node);
+      this.parsePropertyName(node, /* isPattern */ false);
       return this.tsParsePropertyOrMethodSignature(node, readonly);
     }