diff --git a/.changelog/5170.txt b/.changelog/5170.txt
new file mode 100644
index 00000000000..538697cdf8b
--- /dev/null
+++ b/.changelog/5170.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+functions: fixed a error message on `google_cloudfunctions_function`
+```
diff --git a/google/resource_cloudfunctions_function.go b/google/resource_cloudfunctions_function.go
index faceb171b91..f7ae761c6fe 100644
--- a/google/resource_cloudfunctions_function.go
+++ b/google/resource_cloudfunctions_function.go
@@ -655,7 +655,7 @@ func resourceCloudFunctionsUpdate(d *schema.ResourceData, meta interface{}) erro
 				d.Timeout(schema.TimeoutUpdate))
 		}, d.Timeout(schema.TimeoutUpdate))
 		if rerr != nil {
-			return fmt.Errorf("Error while updating cloudfunction configuration: %s", err)
+			return fmt.Errorf("Error while updating cloudfunction configuration: %s", rerr)
 		}
 	}
 	d.Partial(false)