diff --git a/.github/workflows/cmake-multi-platform.yml b/.github/workflows/cmake-multi-platform.yml
index 42439c4..efb59a8 100644
--- a/.github/workflows/cmake-multi-platform.yml
+++ b/.github/workflows/cmake-multi-platform.yml
@@ -57,7 +57,7 @@ jobs:
     - name: Add wxWidgets 3.2 packages
         # this is for build testing only, not shipping binaries, so don't bother verifying the key
       run: |
-        sudo chmod +x script.sh && ./script.sh
+        git submodule update --init src/stc/scintilla && sudo chmod +x script.sh && ./script.sh
 
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.