diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 96b1663..b4251f4 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -6,6 +6,8 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
+      - run: apt-get update
+      - run: apt-get install arm-none-eabi-gcc
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable