Index: dccp/dccp_ackv.h
--- dccp/dccp_ackv.h.orig
+++ dccp/dccp_ackv.h
@@ -64,7 +64,7 @@ struct dccp_ackv_hist_entry {
 class DCCPAckVector {
 private:
 	//packet state names
-	static char* packet_state_str_[DCCP_NUM_PACKET_STATES];
+	static const char* packet_state_str_[DCCP_NUM_PACKET_STATES];
 
         u_char* vector_;       //the real ack vector as a byte array
 	u_int16_t size_;       //current size of vector