diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5b233f0a77..ee91d43446 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,8 +16,7 @@ You should also include the user name that made the change.
 - Improve webhook @syuilo
 
 ### Bugfixes
-- 
-
+- API: parameter validation of users/show was wrong
 
 ## 12.109.2 (2022/04/03)
 
diff --git a/packages/backend/src/server/api/endpoints/users/show.ts b/packages/backend/src/server/api/endpoints/users/show.ts
index b1a568145a..183ff1b8bb 100644
--- a/packages/backend/src/server/api/endpoints/users/show.ts
+++ b/packages/backend/src/server/api/endpoints/users/show.ts
@@ -23,9 +23,9 @@ export const meta = {
 				items: {
 					type: 'object',
 					ref: 'UserDetailed',
-				}
+				},
 			},
-		]
+		],
 	},
 
 	errors: {
@@ -70,7 +70,7 @@ export const paramDef = {
 					description: 'The local host is represented with `null`.',
 				},
 			},
-			required: ['username', 'host'],
+			required: ['username'],
 		},
 	],
 } as const;