diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 76ef41e0798..9f1a0d49300 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -6197,7 +6197,7 @@ namespace ts {
             if (source.symbol.name !== target.symbol.name ||
                 !(source.symbol.flags & SymbolFlags.RegularEnum) || !(target.symbol.flags & SymbolFlags.RegularEnum) ||
                 (source.flags & TypeFlags.Union) !== (target.flags & TypeFlags.Union)) {
-                return (enumRelation[id] = false);
+                return enumRelation[id] = false;
             }
             const targetEnumType = getTypeOfSymbol(target.symbol);
             for (const property of getPropertiesOfType(getTypeOfSymbol(source.symbol))) {
@@ -6208,11 +6208,11 @@ namespace ts {
                             errorReporter(Diagnostics.Property_0_is_missing_in_type_1, property.name,
                                 typeToString(target, /*enclosingDeclaration*/ undefined, TypeFormatFlags.UseFullyQualifiedType));
                         }
-                        return (enumRelation[id] = false);
+                        return enumRelation[id] = false;
                     }
                 }
             }
-            return (enumRelation[id] = true);
+            return enumRelation[id] = true;
         }
 
         function isSimpleTypeRelatedTo(source: Type, target: Type, relation: Map<RelationComparisonResult>, errorReporter?: ErrorReporter) {