diff --git a/.github/workflows/pr-check-build-size.yml b/.github/workflows/pr-check-build-size.yml
index 3f7cb7bf7..8512a30d4 100644
--- a/.github/workflows/pr-check-build-size.yml
+++ b/.github/workflows/pr-check-build-size.yml
@@ -5,8 +5,8 @@ on:
     paths:
       - 'boot/**'
       - 'core/**'
-      - 'themes/snowwhite/**'
-      - 'themes/vanilla/**'
+      - 'themes/tiddlywiki/snowwhite/**'
+      - 'themes/tiddlywiki/vanilla/**'
 
 jobs:
   calculate-build-size: