Index: dccp/dccp.h
--- dccp/dccp.h.orig
+++ dccp/dccp.h
@@ -172,11 +172,11 @@ class DCCPAgent : public Agent { (private)
 	RNG* nonces_;   //random number generator
 
 	//string representation of types
-	static char* state_str_[DCCP_NUM_STATES];
+	static const char* state_str_[DCCP_NUM_STATES];
 	static int hdr_size_[DCCP_NUM_PTYPES];
-	static char* ptype_str_[DCCP_NUM_PTYPES];
-	static char* reset_reason_str_[DCCP_NUM_RESET_REASONS];
-	static char* feature_location_str_[DCCP_NUM_FEAT_LOCS];
+	static const char* ptype_str_[DCCP_NUM_PTYPES];
+	static const char* reset_reason_str_[DCCP_NUM_RESET_REASONS];
+	static const char* feature_location_str_[DCCP_NUM_FEAT_LOCS];
 	
 	bool server_;         //true if this agent i a server
 	dccp_state state_;    //current protocol state