diff --git a/src/include/lwip/snmp.h b/src/include/lwip/snmp.h
index 8c34e315..6f1a3f0f 100644
--- a/src/include/lwip/snmp.h
+++ b/src/include/lwip/snmp.h
@@ -98,7 +98,7 @@ struct snmp_obj_id
 };
 
 const char * snmp_get_community(void);
-void snmp_set_community(const char *community);
+void snmp_set_community(const char * const community);
 
 /* system */
 void snmp_set_sysdescr(const u8_t* str, const u8_t* len);