diff --git a/clients/common/nm-meta-setting-desc.c b/clients/common/nm-meta-setting-desc.c
index 6e35228ad6..04b44f2fb9 100644
--- a/clients/common/nm-meta-setting-desc.c
+++ b/clients/common/nm-meta-setting-desc.c
@@ -995,7 +995,7 @@ _get_fcn_gobject_enum (ARGS_GET_FCN)
 		s =    format_numeric_hex
 		    || (   format_numeric_hex_unknown
 		        && !G_IS_ENUM_CLASS (gtype_class ?: (gtype_class = g_type_class_ref (gtype))))
-		    ? g_strdup_printf ("0x%"G_GINT64_FORMAT, v)
+		    ? g_strdup_printf ("0x%"G_GINT64_MODIFIER"x", v)
 		    : g_strdup_printf ("%"G_GINT64_FORMAT, v);
 		RETURN_STR_TO_FREE (g_steal_pointer (&s));
 	}
@@ -1013,7 +1013,7 @@ _get_fcn_gobject_enum (ARGS_GET_FCN)
 	if (   format_numeric_hex
 	    || (   format_numeric_hex_unknown
 	        && !G_IS_ENUM_CLASS (gtype_class ?: (gtype_class = g_type_class_ref (gtype)))))
-		nm_sprintf_buf (s_numeric, "0x%"G_GINT64_FORMAT, v);
+		nm_sprintf_buf (s_numeric, "0x%"G_GINT64_MODIFIER"x", v);
 	else
 		nm_sprintf_buf (s_numeric, "%"G_GINT64_FORMAT, v);