diff --git a/src/engine/Scrub.c b/src/engine/Scrub.c
index c82b3530d9..dc22b20bad 100644
--- a/src/engine/Scrub.c
+++ b/src/engine/Scrub.c
@@ -673,7 +673,7 @@ gnc_transaction_balance_trading (Transaction *trans, Account *root)
 
         if (! gnc_commodity_equal (txn_curr, commodity))
         {
-            gnc_transaction_get_commodity_imbalance (trans, commodity);
+            val_imbalance = gnc_transaction_get_commodity_imbalance (trans, commodity);
         }
 
         xaccTransBeginEdit (trans);