diff --git a/config_bundles/common/pruning.list b/config_bundles/common/pruning.list
index 872ddcff..95b36f5b 100644
--- a/config_bundles/common/pruning.list
+++ b/config_bundles/common/pruning.list
@@ -15,7 +15,6 @@ build/android/chromium-debug.keystore
 build/android/tests/symbolize/liba.so
 build/android/tests/symbolize/libb.so
 build/linux/sysroot_scripts/debian-archive-sid-stable.gpg
-chrome/browser/resource_coordinator/tab_ranker/example_preprocessor_config.pb
 chrome/browser/resources/chromeos/chromevox/chromevox/background/earcons/alert_modal.ogg
 chrome/browser/resources/chromeos/chromevox/chromevox/background/earcons/alert_nonmodal.ogg
 chrome/browser/resources/chromeos/chromevox/chromevox/background/earcons/button.ogg
diff --git a/devutils/update_lists.py b/devutils/update_lists.py
index fe557ddc..7e9692ed 100755
--- a/devutils/update_lists.py
+++ b/devutils/update_lists.py
@@ -33,6 +33,9 @@ PRUNING_EXCLUDE_PATTERNS = [
     # Exclude AFDO sample profile in binary format (Auto FDO)
     # Details: https://clang.llvm.org/docs/UsersManual.html#sample-profile-formats
     'chrome/android/profiles/afdo.prof',
+    # TabRanker example preprocessor config
+    # Details in chrome/browser/resource_coordinator/tab_ranker/README.md
+    'chrome/browser/resource_coordinator/tab_ranker/example_preprocessor_config.pb',
     # Exclusions for Visual Studio Project generation with GN (PR #445)
     'tools/gn/visual_studio_writer.cc',
     'tools/gyp/pylib/gyp/generator/msvs.py',