diff --git a/lapce-core/build.rs b/lapce-core/build.rs
index 5222d8e6..e027736f 100644
--- a/lapce-core/build.rs
+++ b/lapce-core/build.rs
@@ -97,7 +97,7 @@ fn get_head() -> Option<String> {
     };
     let commit = reference.target();
     println!("cargo::warning=Commit found: {commit:?}");
-    commit.map(|s| s.to_string().split_at(8).0.to_owned())
+    commit.map(|s| s.to_string().split_at(7).0.to_owned())
 }
 
 #[cfg(target_os = "linux")]