diff --git a/core/AmSipDialog.cpp b/core/AmSipDialog.cpp
index 9d9a70c2..e0d199c3 100644
--- a/core/AmSipDialog.cpp
+++ b/core/AmSipDialog.cpp
@@ -33,7 +33,7 @@
 #include "AmServer.h"
 #include "sems.h"
 
-char* AmSipDialog::status2str[4]  = { 	
+const char* AmSipDialog::status2str[4]  = { 	
   "Disconnected",
   "Pending",
   "Connected",
diff --git a/core/AmSipDialog.h b/core/AmSipDialog.h
index 135b9d7d..3e0b0f3b 100644
--- a/core/AmSipDialog.h
+++ b/core/AmSipDialog.h
@@ -111,7 +111,7 @@ class AmSipDialog
     Disconnecting
   };
 
-  static char* status2str[4];
+  static const char* status2str[4];
 
   string user;         // local user
   string domain;       // local domain