diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e00aa759..70edb361 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -65,24 +65,26 @@ jobs:
       matrix:
         target:
           - i686-unknown-linux-gnu
+          - i686-unknown-linux-musl
           - x86_64-unknown-linux-gnu
+          - x86_64-unknown-linux-musl
     steps:
     - name: Checkout
       uses: actions/checkout@v3
 
     - name: Install toolchain
-      uses: dtolnay/rust-toolchain@master
+      uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: stable-${{ matrix.target }}
+        target: ${{ matrix.target }}
 
     - name: Install multilib
-      if: ${{ matrix.target == 'i686-unknown-linux-gnu' }}
+      if: ${{ contains(matrix.target, 'i686-unknown-linux-') }}
       run: |
         sudo apt update -yqq
         sudo apt install gcc-multilib
 
     - name: Run tests
-      run: cargo test --all-features
+      run: cargo test --all-features --target ${{ matrix.target }}
 
   check-stub:
     runs-on: ubuntu-latest
diff --git a/src/unix.rs b/src/unix.rs
index 6e3fd4e8..faa3b36d 100644
--- a/src/unix.rs
+++ b/src/unix.rs
@@ -28,6 +28,18 @@ const MAP_POPULATE: libc::c_int = libc::MAP_POPULATE;
 #[cfg(not(any(target_os = "linux", target_os = "android")))]
 const MAP_POPULATE: libc::c_int = 0;
 
+#[cfg(any(
+    target_os = "android",
+    all(target_os = "linux", not(target_env = "musl"))
+))]
+use libc::{mmap64 as mmap, off64_t as off_t};
+
+#[cfg(not(any(
+    target_os = "android",
+    all(target_os = "linux", not(target_env = "musl"))
+)))]
+use libc::{mmap, off_t};
+
 pub struct MmapInner {
     ptr: *mut libc::c_void,
     len: usize,
@@ -50,13 +62,13 @@ impl MmapInner {
         let (map_len, map_offset) = Self::adjust_mmap_params(len as usize, alignment as usize)?;
 
         unsafe {
-            let ptr = libc::mmap(
+            let ptr = mmap(
                 ptr::null_mut(),
                 map_len as libc::size_t,
                 prot,
                 flags,
                 file,
-                aligned_offset as libc::off_t,
+                aligned_offset as off_t,
             );
 
             if ptr == libc::MAP_FAILED {