1 files changed, 1 insertions, 1 deletions

diff --git a/plugins-root/check_dhcp.c b/plugins-root/check_dhcp.c
index 6b07df51..4b8f5e27 100644
--- a/plugins-root/check_dhcp.c
+++ b/plugins-root/check_dhcp.c
@@ -497,7 +497,7 @@ int send_dhcp_discover(int sock){
                 memcpy(&discover_packet.options[opts],&requested_address,sizeof(requested_address));
                 opts += sizeof(requested_address);
         }
-        discover_packet.options[opts++]=DHCP_OPTION_END;
+        discover_packet.options[opts++]= (char)DHCP_OPTION_END;
 
         /* unicast fields */
         if(unicast)