diff --git a/src/libnm-base/nm-ethtool-base.c b/src/libnm-base/nm-ethtool-base.c
index 78e9fbc183..a75df8a0d0 100644
--- a/src/libnm-base/nm-ethtool-base.c
+++ b/src/libnm-base/nm-ethtool-base.c
@@ -271,7 +271,7 @@ nm_ethtool_data_get_by_optname(const char *optname)
 
     _ASSERT_data();
 
-    idx = nm_utils_array_find_binary_search((gconstpointer *) _by_name,
+    idx = nm_utils_array_find_binary_search(_by_name,
                                             sizeof(_by_name[0]),
                                             _NM_ETHTOOL_ID_NUM,
                                             optname,