diff --git a/modules/swagger-codegen/src/main/resources/go/api_client.mustache b/modules/swagger-codegen/src/main/resources/go/api_client.mustache
index be0f60673d8..e11f4eaba8b 100644
--- a/modules/swagger-codegen/src/main/resources/go/api_client.mustache
+++ b/modules/swagger-codegen/src/main/resources/go/api_client.mustache
@@ -94,7 +94,7 @@ func (c *APIClient) ParameterToString(obj interface{},collectionFormat string) s
 		}
 	}
 
-	return obj.(string)
+	return fmt.Sprintf("%v", obj)
 }
 
 func prepareRequest(postBody interface{},