diff --git a/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/desugar/TransactionDesugar.java b/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/desugar/TransactionDesugar.java
index 886b44eefb74..d89ce5c31b7d 100644
--- a/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/desugar/TransactionDesugar.java
+++ b/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/desugar/TransactionDesugar.java
@@ -441,6 +441,7 @@ void createRollbackIfFailed(Location pos, BLangBlockStmt onFailBodyBlock,
 
         // transactional
         BLangTransactionalExpr isTransactionalCheck = TreeBuilder.createTransactionalExpressionNode();
+        isTransactionalCheck.setBType(symTable.booleanType);
         isTransactionalCheck.pos = pos;
 
         // if(($trxError$ is error) && !($trxError$ is TransactionError) && transactional)