diff --git a/src/plugins/python/weechat-python-api.c b/src/plugins/python/weechat-python-api.c
index 88194ba71..b28abfbc0 100644
--- a/src/plugins/python/weechat-python-api.c
+++ b/src/plugins/python/weechat-python-api.c
@@ -3120,7 +3120,7 @@ API_FUNC(hook_signal)
 
 API_FUNC(hook_signal_send)
 {
-    char *signal, *type_data, *signal_data, *error;
+    char *signal, *type_data, *signal_data;
     int number, rc;
 
     API_INIT_FUNC(1, "hook_signal_send", API_RETURN_INT(WEECHAT_RC_ERROR));
@@ -3137,9 +3137,7 @@ API_FUNC(hook_signal_send)
     }
     else if (strcmp (type_data, WEECHAT_HOOK_SIGNAL_INT) == 0)
     {
-        error = NULL;
-        number = (int)strtol (signal_data, &error, 10);
-        if (error && !error[0])
+        if (weechat_util_parse_int (signal_data, 10, &number))
             rc = weechat_hook_signal_send (signal, type_data, &number);
         else
             rc = WEECHAT_RC_ERROR;