diff --git a/CHANGES b/CHANGES
index 8fed6a5..83f0328 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,9 +1,11 @@
+* Fixed writing beyond array bounds
+
 Release 0.4.3 (Mai 2013)
------------------
+------------------------
 * Fixed tunemu compiling issue
 
 Release 0.4.2 (Mai 2013)
------------------
+------------------------
 * Fixed compilation issue on Linux
 * Changed the license of tunemu from GPL to BSD
 * Minor changes
diff --git a/src/tun.cpp b/src/tun.cpp
index 2d624ea..eef57fa 100644
--- a/src/tun.cpp
+++ b/src/tun.cpp
@@ -41,7 +41,7 @@ Tun::Tun(const char *device, int mtu)
     if (device != NULL)
     {
         strncpy(this->device, device, VTUN_DEV_LEN);
-        this->device[VTUN_DEV_LEN] = 0;
+        this->device[VTUN_DEV_LEN-1] = 0;
     }
     else
         this->device[0] = 0;