diff --git a/crates/client/rpc/src/versions/v0_7_1/methods/read/estimate_fee.rs b/crates/client/rpc/src/versions/v0_7_1/methods/read/estimate_fee.rs
index 3c7436330..c981e283b 100644
--- a/crates/client/rpc/src/versions/v0_7_1/methods/read/estimate_fee.rs
+++ b/crates/client/rpc/src/versions/v0_7_1/methods/read/estimate_fee.rs
@@ -46,16 +46,19 @@ pub async fn estimate_fee(
 
     let execution_results = exec_context.re_execute_transactions([], transactions, true, validate)?;
 
-    let fee_estimates = execution_results.iter().enumerate().try_fold(Vec::new(), |mut acc, (index, result)| {
-        if result.execution_info.is_reverted() {
-            return Err(StarknetRpcApiError::TxnExecutionError {
-                tx_index: index,
-                error: result.execution_info.revert_error.clone().unwrap_or_default(),
-            });
-        }
-        acc.push(exec_context.execution_result_to_fee_estimate(result));
-        Ok(acc)
-    })?;
+    let fee_estimates = execution_results.iter().enumerate().try_fold(
+        Vec::with_capacity(execution_results.len()),
+        |mut acc, (index, result)| {
+            if result.execution_info.is_reverted() {
+                return Err(StarknetRpcApiError::TxnExecutionError {
+                    tx_index: index,
+                    error: result.execution_info.revert_error.clone().unwrap_or_default(),
+                });
+            }
+            acc.push(exec_context.execution_result_to_fee_estimate(result));
+            Ok(acc)
+        },
+    )?;
 
     Ok(fee_estimates)
 }