diff --git a/src/NHibernate/SqlCommand/Parser/SqlTokenizerExtensions.cs b/src/NHibernate/SqlCommand/Parser/SqlTokenizerExtensions.cs
index cb3ebffcab7..3171b6e6204 100644
--- a/src/NHibernate/SqlCommand/Parser/SqlTokenizerExtensions.cs
+++ b/src/NHibernate/SqlCommand/Parser/SqlTokenizerExtensions.cs
@@ -62,7 +62,7 @@ public static bool TryParseUntilFirstMsSqlSelectColumn(this IEnumerator<SqlToken
 				// [ TOP { integer | ( expression ) } [PERCENT] [ WITH TIES ] ] 
 				if (tokenEnum.Current.Equals("top", StringComparison.InvariantCultureIgnoreCase))
 				{
-					if (tokenEnum.MoveNext()) return false;
+					if (!tokenEnum.MoveNext()) return false;
 					if (tokenEnum.Current.TokenType == SqlTokenType.BracketOpen)
 					{
 						do
@@ -70,8 +70,7 @@ public static bool TryParseUntilFirstMsSqlSelectColumn(this IEnumerator<SqlToken
 							if (!tokenEnum.MoveNext()) return false;
 						} while (tokenEnum.Current.TokenType != SqlTokenType.BracketClose);
 					}
-					if (tokenEnum.MoveNext()) return false;
-
+					if (!tokenEnum.MoveNext()) return false;
 
 					if (tokenEnum.Current.Equals("percent", StringComparison.InvariantCultureIgnoreCase))
 					{