diff --git a/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer.rs b/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer.rs
index 9049f0238f..db1f0767d0 100644
--- a/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer.rs
+++ b/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer.rs
@@ -116,7 +116,7 @@ impl IndexWriterWrapper {
 
     pub fn add_json_key_stats(
         &mut self,
-        keys: &[*const i8],
+        keys: &[*const c_char],
         json_offsets: &[*const i64],
         json_offsets_len: &[usize],
     ) -> Result<()> {
diff --git a/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer_v5/index_writer.rs b/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer_v5/index_writer.rs
index c0738bbc7d..50edb9b8f6 100644
--- a/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer_v5/index_writer.rs
+++ b/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer_v5/index_writer.rs
@@ -190,7 +190,7 @@ impl IndexWriterWrapperImpl {
 
     pub fn add_json_key_stats(
         &mut self,
-        keys: &[*const i8],
+        keys: &[*const c_char],
         json_offsets: &[*const i64],
         json_offsets_len: &[usize],
     ) -> Result<()> {
diff --git a/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer_v7/index_writer.rs b/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer_v7/index_writer.rs
index 37cc7e2e58..5c33bd55fa 100644
--- a/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer_v7/index_writer.rs
+++ b/internal/core/thirdparty/tantivy/tantivy-binding/src/index_writer_v7/index_writer.rs
@@ -160,7 +160,7 @@ impl IndexWriterWrapperImpl {
 
     pub fn add_json_key_stats(
         &mut self,
-        keys: &[*const i8],
+        keys: &[*const c_char],
         json_offsets: &[*const i64],
         json_offsets_len: &[usize],
     ) -> Result<()> {