diff --git a/packages/mermaid/src/diagrams/class/classTypes.ts b/packages/mermaid/src/diagrams/class/classTypes.ts
index 5eaf4fba8..2f779a238 100644
--- a/packages/mermaid/src/diagrams/class/classTypes.ts
+++ b/packages/mermaid/src/diagrams/class/classTypes.ts
@@ -35,7 +35,7 @@ export class ClassMember {
   getDisplayDetails() {
     let displayText = this.visibility + parseGenericTypes(this.id);
     if (this.memberType === 'method') {
-      displayText += '(' + parseGenericTypes(this.parameters.trim()) + ')';
+      displayText += `(${parseGenericTypes(this.parameters.trim())})`;
       if (this.returnType) {
         displayText += ' : ' + parseGenericTypes(this.returnType);
       }