diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index f3db20e..b659bfa 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -1,2 +1,4 @@
 [Hook Scripts]
 checkstyle_hook = ${REPO_ROOT}/prebuilts/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}
+
+ktfmt_hook = ${REPO_ROOT}/external/ktfmt/ktfmt.py --check -i ${REPO_ROOT}/packages/apps/ThemePicker/ktfmt_includes.txt ${PREUPLOAD_FILES}
diff --git a/ktfmt_includes.txt b/ktfmt_includes.txt
new file mode 100644
index 0000000..703e852
--- /dev/null
+++ b/ktfmt_includes.txt
@@ -0,0 +1,7 @@
++src/
++src_override/
++tests/
+-src/com/android/customization/model/color/ColorProvider.kt
+-src/com/android/customization/model/color/ColorUtils.kt
+-src/com/android/customization/module/SysUiStatsLogger.kt
+-src/com/android/customization/picker/clock/ClockSectionView.kt