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--- a/src/DIF/EFCP/DTP/UserDataField.h
+++ b/src/DIF/EFCP/DTP/UserDataField.h
@@ -62,6 +62,7 @@
     unsigned int getSduDelimitFlags() const;
     void setSduDelimitFlags(unsigned int sduDelimitFlags);
     unsigned int getSduSeqNum() const;
+    void setSduSeqNum(unsigned int sduSeqNum);
 };
 
 #endif /* USERDATAFIELD_H_ */