diff --git a/src/fu-tool.c b/src/fu-tool.c
index fbffb97d2..b1dd886ca 100644
--- a/src/fu-tool.c
+++ b/src/fu-tool.c
@@ -653,7 +653,7 @@ fu_util_get_device (FuUtilPrivate *priv, const gchar *id, GError **error)
 					     FWUPD_ERROR,
 					     FWUPD_ERROR_INVALID_ARGS,
 					     "Invalid arguments");
-			return FALSE;
+			return NULL;
 		}
 	}
 	return fu_engine_get_device (priv->engine, id, error);
diff --git a/src/fu-util.c b/src/fu-util.c
index 733dda7a0..36aaf9a64 100644
--- a/src/fu-util.c
+++ b/src/fu-util.c
@@ -1047,7 +1047,7 @@ fu_util_get_device_by_id (FuUtilPrivate *priv, const gchar *id, GError **error)
 					     FWUPD_ERROR,
 					     FWUPD_ERROR_INVALID_ARGS,
 					     "Invalid arguments");
-			return FALSE;
+			return NULL;
 		}
 	}
 	return fwupd_client_get_device_by_id (priv->client, id, NULL, error);