diff --git a/crates/mako/src/generate/generate_chunks.rs b/crates/mako/src/generate/generate_chunks.rs
index e8b40dbb1..68fe12e3e 100644
--- a/crates/mako/src/generate/generate_chunks.rs
+++ b/crates/mako/src/generate/generate_chunks.rs
@@ -43,24 +43,26 @@ impl ChunkFile {
         // fixed os error 63 file name too long, reserve 48 bytes for _js-async、extension、.map and others
         let reserve_file_name_length = 207;
         let file_path = Path::new(&self.file_name);
+        let mut format_file_name = self.file_name.clone();
+        if self.file_name.len() > reserve_file_name_length {
+            let mut hasher: XxHash64 = Default::default();
+            hasher.write_str(self.file_name.as_str());
+            let file_extension = file_path.extension().unwrap();
+            let file_stem = file_path.file_stem().unwrap().to_string_lossy().to_string();
+            let (_, reserve_file_path) =
+                file_stem.split_at(file_stem.len() - reserve_file_name_length);
+            format_file_name = format!(
+                "{}.{}.{}",
+                reserve_file_path,
+                &hasher.finish().to_string()[0..8],
+                file_extension.to_str().unwrap()
+            );
+        }
+
         if let Some(hash) = &self.hash {
-            hash_file_name(&self.file_name, hash)
+            hash_file_name(&format_file_name, hash)
         } else {
-            if self.file_name.len() > reserve_file_name_length {
-                let mut hasher: XxHash64 = Default::default();
-                hasher.write_str(self.file_name.as_str());
-                let file_extension = file_path.extension().unwrap();
-                let file_stem = file_path.file_stem().unwrap().to_string_lossy().to_string();
-                let (_, reserve_file_path) =
-                    file_stem.split_at(file_stem.len() - reserve_file_name_length);
-                return format!(
-                    "{}.{}.{}",
-                    reserve_file_path,
-                    &hasher.finish().to_string()[0..8],
-                    file_extension.to_str().unwrap()
-                );
-            }
-            self.file_name.clone()
+            format_file_name
         }
     }