diff --git a/check_source/check_spelling.py b/check_source/check_spelling.py
index edb152422e3d27e3d41ae41f48e13a5a82d6c900..aac5c0042f605d4a71597f5e1dfe1106afc14fbb 100755
--- a/check_source/check_spelling.py
+++ b/check_source/check_spelling.py
@@ -178,6 +178,9 @@ def extract_c_comments(filepath):
         r"\subsection",
         r"\subsubsection",
         r"\ingroup",
+        r"\param[in]",
+        r"\param[out]",
+        r"\param[in,out]",
         r"\param",
         r"\page",
         )