diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 92e59b799b..5c967a3ed4 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -119,8 +119,8 @@ jobs:
         uses: actions/cache@v5
         with:
           path: ${{ runner.temp }}/.tdesktop-cache
-          key: ${{ runner.OS }}-tdesktop${{ case(!!matrix.defines, format('-{0}', matrix.defines), '') }}-${{ github.run_id }}
-          restore-keys: ${{ runner.OS }}-tdesktop${{ case(!!matrix.defines, format('-{0}', matrix.defines), '') }}-
+          key: ${{ runner.OS }}-tdesktop-${{ matrix.defines || 'null' }}-${{ github.run_id }}
+          restore-keys: ${{ runner.OS }}-tdesktop-${{ matrix.defines || 'null' }}-
 
       - name: Telegram Desktop build.
         if: env.ONLY_CACHE == 'false'