diff --git a/core/src/main/java/org/hibernate/dialect/DB2390Dialect.java b/core/src/main/java/org/hibernate/dialect/DB2390Dialect.java
index ed93e37568..f482a0da9d 100644
--- a/core/src/main/java/org/hibernate/dialect/DB2390Dialect.java
+++ b/core/src/main/java/org/hibernate/dialect/DB2390Dialect.java
@@ -59,6 +59,9 @@ public class DB2390Dialect extends DB2Dialect {
 		if ( offset > 0 ) {
 			throw new UnsupportedOperationException( "query result offset is not supported" );
 		}
+		if ( limit == 0 ) {
+			return sql;
+		}
 		return new StringBuffer( sql.length() + 40 )
 				.append( sql )
 				.append( " fetch first " )
diff --git a/core/src/main/java/org/hibernate/dialect/DB2400Dialect.java b/core/src/main/java/org/hibernate/dialect/DB2400Dialect.java
index c7d9e3bdd3..77f7c54329 100644
--- a/core/src/main/java/org/hibernate/dialect/DB2400Dialect.java
+++ b/core/src/main/java/org/hibernate/dialect/DB2400Dialect.java
@@ -59,6 +59,9 @@ public class DB2400Dialect extends DB2Dialect {
 		if ( offset > 0 ) {
 			throw new UnsupportedOperationException( "query result offset is not supported" );
 		}
+		if ( limit == 0 ) {
+			return sql;
+		}
 		return new StringBuffer( sql.length() + 40 )
 				.append( sql )
 				.append( " fetch first " )