diff --git a/src/generator/paths.ts b/src/generator/paths.ts
index 3ddaea39..c0cf1b15 100644
--- a/src/generator/paths.ts
+++ b/src/generator/paths.ts
@@ -92,7 +92,7 @@ export const getOpenApiPathsObject = (
           description,
           tags,
           security: protect ? [{ Authorization: [] }] : undefined,
-          requestBody: getRequestBodyObject(inputParser),
+          requestBody: getRequestBodyObject(inputParser, pathParameters),
           parameters: getParameterObjects(inputParser, pathParameters, 'path'),
           responses: getResponsesObject(outputParser),
         },
diff --git a/src/generator/schema.ts b/src/generator/schema.ts
index f8c16607..2f40326f 100644
--- a/src/generator/schema.ts
+++ b/src/generator/schema.ts
@@ -106,7 +106,10 @@ export const getParameterObjects = (
     });
 };
 
-export const getRequestBodyObject = (schema: unknown): OpenAPIV3.RequestBodyObject | undefined => {
+export const getRequestBodyObject = (
+  schema: unknown,
+  pathParameters: string[],
+): OpenAPIV3.RequestBodyObject | undefined => {
   if (!instanceofZod(schema)) {
     throw new TRPCError({
       message: 'Input parser expects a Zod validator',
@@ -122,11 +125,25 @@ export const getRequestBodyObject = (schema: unknown): OpenAPIV3.RequestBodyObje
     return undefined;
   }
 
+  if (!instanceofZodTypeKind(schema, z.ZodFirstPartyTypeKind.ZodObject)) {
+    throw new TRPCError({
+      message: 'Input parser must be a ZodObject',
+      code: 'INTERNAL_SERVER_ERROR',
+    });
+  }
+
+  // remove path parameters
+  const mask: Record<string, true> = {};
+  pathParameters.forEach((pathParameter) => {
+    mask[pathParameter] = true;
+  });
+  const dedupedSchema = schema.omit(mask);
+
   return {
     required: !schema.isOptional(),
     content: {
       'application/json': {
-        schema: zodSchemaToOpenApiSchemaObject(schema),
+        schema: zodSchemaToOpenApiSchemaObject(dedupedSchema),
       },
     },
   };
diff --git a/test/generator.test.ts b/test/generator.test.ts
index 1b0ba5f3..411b53f3 100644
--- a/test/generator.test.ts
+++ b/test/generator.test.ts
@@ -893,16 +893,10 @@ describe('generator', () => {
                     "schema": Object {
                       "additionalProperties": false,
                       "properties": Object {
-                        "id": Object {
-                          "type": "string",
-                        },
                         "name": Object {
                           "type": "string",
                         },
                       },
-                      "required": Array [
-                        "id",
-                      ],
                       "type": "object",
                     },
                   },