diff --git a/check_source/check_spelling_c_config.py b/check_source/check_spelling_c_config.py
index 025660a22c0a6bd66dc6a1aff11806e5e0548221..bf27f2631f6c33dfd58b20dc883c92fb2570ba6d 100644
--- a/check_source/check_spelling_c_config.py
+++ b/check_source/check_spelling_c_config.py
@@ -42,6 +42,7 @@ dict_custom = {
     "anisotropic",
     "anisotropy",
     "atomicity",
+    "bindless",
     "bitwise",
     "blocky",
     "boolean",
@@ -267,6 +268,7 @@ dict_custom = {
     "subclassing",
     "subdirectories",
     "subdirectory",
+    "subtractive",
     "symmetrize",
     "symmetrized",
     "targetless",