diff --git a/libgit2-sys/build.rs b/libgit2-sys/build.rs
index 36dc3d9b8f..9da3c183c9 100644
--- a/libgit2-sys/build.rs
+++ b/libgit2-sys/build.rs
@@ -32,6 +32,7 @@ fn main() {
 
     let target = env::var("TARGET").unwrap();
     let windows = target.contains("windows");
+    let aarch64 = target.contains("aarch64");
     let dst = PathBuf::from(env::var_os("OUT_DIR").unwrap());
     let include = dst.join("include");
     let mut cfg = cc::Build::new();
@@ -106,6 +107,10 @@ fn main() {
         cfg.define("__EXTENSIONS__", None);
     }
 
+    if aarch64 {
+        cfg.flag("-mno-outline-atomics");
+    }
+
     let mut features = String::new();
 
     features.push_str("#ifndef INCLUDE_features_h\n");