diff --git a/check_source/check_spelling_c_config.py b/check_source/check_spelling_c_config.py
index 8ddc405b004f836e5a1d88a8a890a1d4e38a85ec..dc31b4429c8ada0d90b56ed154547a456197055a 100644
--- a/check_source/check_spelling_c_config.py
+++ b/check_source/check_spelling_c_config.py
@@ -137,6 +137,7 @@ dict_custom = {
     "ortho",
     "recalc",
     "reparent",
+    "resync",
     "struct", "structs",
     "subdir",
     "tooltip",