diff --git a/datafusion/core/src/datasource/file_format/options.rs b/datafusion/core/src/datasource/file_format/options.rs
index 1e0e28ef88cb..e392515cacb1 100644
--- a/datafusion/core/src/datasource/file_format/options.rs
+++ b/datafusion/core/src/datasource/file_format/options.rs
@@ -262,6 +262,12 @@ impl<'a> ParquetReadOptions<'a> {
         Default::default()
     }
 
+    /// Specify file_extension
+    pub fn file_extension(mut self, file_extension: &'a str) -> Self {
+        self.file_extension = file_extension;
+        self
+    }
+
     /// Specify parquet_pruning
     pub fn parquet_pruning(mut self, parquet_pruning: bool) -> Self {
         self.parquet_pruning = Some(parquet_pruning);