diff --git a/.github/actions/spelling/line_forbidden.patterns b/.github/actions/spelling/line_forbidden.patterns
index 057b9b4a..61dd2c3c 100644
--- a/.github/actions/spelling/line_forbidden.patterns
+++ b/.github/actions/spelling/line_forbidden.patterns
@@ -277,6 +277,9 @@
 # Should be `we'll`
 \bwe 'll\b
 
+# Should be `whereas`
+\bwhere as\b
+
 # Should be `workarounds`
 \bwork[- ]arounds\b