diff --git a/rust/src/builders/tx_builder.rs b/rust/src/builders/tx_builder.rs
index 7c6583f0..b53f1bbc 100644
--- a/rust/src/builders/tx_builder.rs
+++ b/rust/src/builders/tx_builder.rs
@@ -2307,7 +2307,6 @@ impl TransactionBuilder {
     fn build_and_size(&self) -> Result<(TransactionBody, usize), JsError> {
         let fee = self
             .get_fee_if_set()
-            .or(self.get_fee_if_set())
             .ok_or_else(|| JsError::from_str("Fee not specified"))?;
 
         let built = TransactionBody {