diff --git a/.github/workflows/nightly_build_windows.yml b/.github/workflows/nightly_build_windows.yml
index 74ea86120..f62fdffd6 100644
--- a/.github/workflows/nightly_build_windows.yml
+++ b/.github/workflows/nightly_build_windows.yml
@@ -15,7 +15,7 @@ env:
 
   DOCKER_REPOSITORY: ${{ vars.DOCKER_REPOSITORY }}
   LATEST_BRANCH: ${{ github.event.repository.default_branch }}
-  TRUNK_GIT_BRANCH: ${{ env.TRUNK_ONLY_EVENT != true && "refs/heads/trunk" }}
+  TRUNK_GIT_BRANCH: "refs/heads/trunk"
   IMAGES_PREFIX: "zabbix-"
 
   MSFT_BASE_BUILD_IMAGE: "mcr.microsoft.com/windows/servercore"
@@ -55,7 +55,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
-          ref: ${{ env.TRUNK_GIT_BRANCH }}
+          ref: ${{ env.TRUNK_ONLY_EVENT != true && env.TRUNK_GIT_BRANCH }}
           fetch-depth: 1
           sparse-checkout: ${{ env.MATRIX_FILE }}