diff --git a/.github/workflows/spell_check.yml b/.github/workflows/spell_check.yml
index 4ba3509a..fd42cfb9 100644
--- a/.github/workflows/spell_check.yml
+++ b/.github/workflows/spell_check.yml
@@ -22,6 +22,6 @@ jobs:
       uses: codespell-project/actions-codespell@v2
       with:
         skip: Arduino_package/hardware/libraries/SoftwareSerial/src/Adafruit_GPS.cpp,Arduino_package/hardware/libraries/SoftwareSerial/src/Adafruit_GPS.h,Arduino_package/hardware/libraries/SoftwareSerial/src/SoftwareSerial.cpp,Arduino_package/hardware/libraries/SoftwareSerial/src/SoftwareSerial.h
-        ignore_words_list: ameba
+        ignore_words_list: ameba, shiftIn
 #        ignore_words_file: Ameba_misc/Spell_Check_Ignore/.codespellignore
         path: ${{ matrix.path }}