diff --git a/hibernate-core/src/main/java/org/hibernate/dialect/DB2Dialect.java b/hibernate-core/src/main/java/org/hibernate/dialect/DB2Dialect.java
index 6564635b39..cf0a883e4a 100644
--- a/hibernate-core/src/main/java/org/hibernate/dialect/DB2Dialect.java
+++ b/hibernate-core/src/main/java/org/hibernate/dialect/DB2Dialect.java
@@ -348,7 +348,7 @@ public class DB2Dialect extends Dialect {
 			default:
 				literal = "0";
 		}
-		return "nullif(" + literal + ',' + literal + ')';
+		return "nullif(" + literal + ", " + literal + ')';
 	}
 
 	@Override