diff --git a/src/execution/values.ts b/src/execution/values.ts
index 1d5b346381..12bab5cb6b 100644
--- a/src/execution/values.ts
+++ b/src/execution/values.ts
@@ -84,8 +84,8 @@ function coerceVariableValues(
 
     const { name: varName, type: varType } = varSignature;
     if (!Object.hasOwn(inputs, varName)) {
-      if (varSignature.hasDefaultValue) {
-        coercedValues[varName] = varSignature.getDefaultValue();
+      if (varDefNode.defaultValue) {
+        coercedValues[varName] = varSignature.defaultValue;
       } else if (isNonNullType(varType)) {
         const varTypeStr = inspect(varType);
         onError(
diff --git a/src/utilities/getVariableSignature.ts b/src/utilities/getVariableSignature.ts
index ec531ce914..4ff7e977e4 100644
--- a/src/utilities/getVariableSignature.ts
+++ b/src/utilities/getVariableSignature.ts
@@ -5,43 +5,18 @@ import { print } from '../language/printer.js';
 import type { GraphQLInputType, GraphQLSchema } from '../type/index.js';
 import { isInputType } from '../type/index.js';
 
-import type { ConstValueNode, VariableDefinitionNode } from '../index.js';
+import type { VariableDefinitionNode } from '../index.js';
 
 import { typeFromAST } from './typeFromAST.js';
 import { valueFromAST } from './valueFromAST.js';
 
 /**
  * A GraphQLVariableSignature is required to coerce a variable value.
- *
- * @internal
  * */
-export class GraphQLVariableSignature {
+export interface GraphQLVariableSignature {
   name: string;
   type: GraphQLInputType;
-  hasDefaultValue: boolean;
-  _defaultValue: unknown;
-
-  constructor(
-    name: string,
-    type: GraphQLInputType,
-    defaultValueNode: ConstValueNode | undefined,
-  ) {
-    this.name = name;
-    this.type = type;
-    if (defaultValueNode) {
-      this.hasDefaultValue = true;
-      this._defaultValue = () => valueFromAST(defaultValueNode, type);
-    } else {
-      this.hasDefaultValue = false;
-    }
-  }
-
-  getDefaultValue(): unknown {
-    if (typeof this._defaultValue === 'function') {
-      this._defaultValue = this._defaultValue();
-    }
-    return this._defaultValue;
-  }
+  defaultValue: unknown;
 }
 
 export function getVariableSignature(
@@ -61,9 +36,9 @@ export function getVariableSignature(
     );
   }
 
-  return new GraphQLVariableSignature(
-    varName,
-    varType,
-    varDefNode.defaultValue,
-  );
+  return {
+    name: varName,
+    type: varType,
+    defaultValue: valueFromAST(varDefNode.defaultValue, varType),
+  };
 }