diff --git a/.github/workflows/humble-source-build.yml b/.github/workflows/humble-source-build.yml
index 878ad92677..1a241896f4 100644
--- a/.github/workflows/humble-source-build.yml
+++ b/.github/workflows/humble-source-build.yml
@@ -1,6 +1,9 @@
 name: Humble Source Build
 on:
   workflow_dispatch:
+  pull_request:
+    branches:
+      - humble
   push:
     branches:
       - humble