diff --git a/include/msgapi.h b/include/msgapi.h
index 0e13ecf..a194e0c 100644
--- a/include/msgapi.h
+++ b/include/msgapi.h
@@ -73,7 +73,7 @@ typedef struct _MsgSQLHandle {
 	} stmts;
 
 	BongoMemStack *memstack;
-	XplSemaphore *transactionLock;
+	XplSemaphore transactionLock;
 	int transactionDepth;
 	int lockTimeoutMs;
 	BOOL isNew;		// have we just created this?