diff --git a/src/error.ts b/src/error.ts
index 4002525..e5277cc 100644
--- a/src/error.ts
+++ b/src/error.ts
@@ -18,3 +18,15 @@ export default class PowerGuardError extends Error {
     this.details = details;
   }
 }
+
+export class PowerGuardKeyError extends Error {
+  key: string;
+  gut: PowerGuardError;
+
+  constructor(key: string, gut: PowerGuardError) {
+    super(`Guard "${key}" failed: ${gut.message}`);
+
+    this.key = key;
+    this.gut = gut;
+  }
+}
diff --git a/src/index.ts b/src/index.ts
index 5e27113..a23a777 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,6 +1,6 @@
 import { isObject } from './types';
 import { GuardFunction } from './global';
-import PowerGuardError from './error';
+import PowerGuardError, { PowerGuardKeyError } from './error';
 
 export type DataConfig = {
   [key: string]: GuardFunction<unknown>;
@@ -10,7 +10,7 @@ export type GuardedData<T extends DataConfig> = {
   [key in keyof T]: ReturnType<T[key]>;
 };
 
-export const guard = <T extends DataConfig>(config: T): GuardFunction<GuardedData<T>> => (
+const guard = <T extends DataConfig>(config: T): GuardFunction<GuardedData<T>> => (
   data: unknown,
 ) => {
   if (!isObject(data)) {
@@ -23,7 +23,14 @@ export const guard = <T extends DataConfig>(config: T): GuardFunction<GuardedDat
     // @ts-ignore
     const value = data[key];
 
-    guarded[key] = config[key](value) as ReturnType<T[typeof key]>;
+    try {
+      guarded[key] = config[key](value) as ReturnType<T[typeof key]>;
+    } catch (error) {
+      if (error instanceof PowerGuardError) {
+        throw new PowerGuardKeyError(String(key), error);
+      }
+      throw error;
+    }
   });
 
   return guarded;
@@ -35,7 +42,7 @@ export * from './global';
 
 export * from './types';
 
-export { default as PowerGuardError } from './error';
+export { default as PowerGuardError, PowerGuardKeyError } from './error';
 
 export { default as array } from './array';
 
diff --git a/tests/index.test.ts b/tests/index.test.ts
index 3987456..e3c0478 100644
--- a/tests/index.test.ts
+++ b/tests/index.test.ts
@@ -1,5 +1,6 @@
-import guard, { number, string, enumGuard, boolean, array, PowerGuardError } from '../src';
+import guard, { number, string, enumGuard, boolean, array } from '../src';
 import { expect } from 'chai';
+import PowerGuardError, { PowerGuardKeyError } from '../src/error';
 
 enum Foo {
   key1 = 'key1',
@@ -50,7 +51,7 @@ describe('Power guard', () => {
         bla: 1,
         bnd: [{ foo: '123' }],
       }),
-    ).throws(PowerGuardError);
+    ).throws(PowerGuardKeyError);
 
     expect(() =>
       guardFunc({
@@ -60,7 +61,7 @@ describe('Power guard', () => {
         bla: 1,
         bnd: [{ foo: 123 }],
       }),
-    ).throws(PowerGuardError);
+    ).throws(PowerGuardKeyError);
 
     expect(() =>
       guardFunc(`{