diff --git a/quickfixj-core/src/main/java/quickfix/Session.java b/quickfixj-core/src/main/java/quickfix/Session.java
index 80c1782ddc..06a88b50d9 100644
--- a/quickfixj-core/src/main/java/quickfix/Session.java
+++ b/quickfixj-core/src/main/java/quickfix/Session.java
@@ -2163,7 +2163,7 @@ private void nextLogon(Message logon) throws FieldNotFound, RejectLogon, Incorre
             throw new RejectLogon("Logon attempt not within session time");
         }
 
-        if (sessionID.isFIXT()) {
+        if (sessionID.isFIXT() && dataDictionaryProvider != null) {
             final DataDictionary dictionary = dataDictionaryProvider
                     .getSessionDataDictionary(sessionID.getBeginString());
             if (dictionary != null) {