diff --git a/openair2/UTIL/OPT/opt.h b/openair2/UTIL/OPT/opt.h
index 912d846723..38a834b73e 100644
--- a/openair2/UTIL/OPT/opt.h
+++ b/openair2/UTIL/OPT/opt.h
@@ -74,8 +74,8 @@ typedef guint8   gboolean;
 /*---------------------------------------------------------------------------------------------------------------------------------------------*/
 #define OPT_PARAMS_DESC {  \
     {"type" ,               CONFIG_HLP_TYPEMON,     0,            strptr:&in_type,        defstrval:"none",               TYPE_STRING,    0},   \
-    {"ip" ,                 CONFIG_HLP_L2MONIP,     0,            strptr:&in_ip,          defstrval:"127.0.0.1",          TYPE_STRING,    0},   \
-    {"path" ,               CONFIG_HLP_L2MONPATH,   0,            strptr:&in_path,        defstrval:"/tmp/oai_opt.pcap",  TYPE_STRING,    0},   \
+    {"ip" ,                 CONFIG_HLP_L2MONIP,     0,            strptr:(char**)&in_ip,  defstrval:"127.0.0.1",          TYPE_STRING,    0},   \
+    {"path" ,               CONFIG_HLP_L2MONPATH,   0,            strptr:(char**)&in_path,defstrval:"/tmp/oai_opt.pcap",  TYPE_STRING,    0},   \
   }
 
 #define OPTTYPE_IDX 0