diff --git a/src/core/snmp/mib2.c b/src/core/snmp/mib2.c
index fe1bf6d7..c5369509 100644
--- a/src/core/snmp/mib2.c
+++ b/src/core/snmp/mib2.c
@@ -51,6 +51,8 @@
 #include "lwip/sys.h"
 #include "netif/etharp.h"
 
+#include <string.h>
+
 /**
  * IANA assigned enterprise ID for lwIP is 26381
  * @see http://www.iana.org/assignments/enterprise-numbers
@@ -893,40 +895,6 @@ static u32_t snmpinpkts = 0,
              snmpouttraps = 0;
 
 
-
-/* prototypes of the following functions are in lwip/src/include/lwip/snmp.h */
-/**
- * Copy octet string.
- *
- * @param dst points to destination
- * @param src points to source
- * @param n number of octets to copy.
- */
-static void ocstrncpy(u8_t *dst, const u8_t *src, u16_t n)
-{
-  u16_t i = n;
-  while (i > 0) {
-    i--;
-    *dst++ = *src++;
-  }
-}
-
-/**
- * Copy object identifier (s32_t) array.
- *
- * @param dst points to destination
- * @param src points to source
- * @param n number of sub identifiers to copy.
- */
-void objectidncpy(s32_t *dst, const s32_t *src, u8_t n)
-{
-  u8_t i = n;
-  while(i > 0) {
-    i--;
-    *dst++ = *src++;
-  }
-}
-
 /**
  * Initializes sysDescr pointers.
  *
@@ -2204,10 +2172,10 @@ system_get_value(struct obj_def *od, u16_t len, void *value)
   switch (id)
   {
     case 1: /* sysDescr */
-      ocstrncpy((u8_t*)value, sysdescr_ptr, len);
+      MEMCPY(value, sysdescr_ptr, len);
       break;
     case 2: /* sysObjectID */
-      objectidncpy((s32_t*)value, (s32_t*)sysobjid.id, (u8_t)(len / sizeof(s32_t)));
+      MEMCPY(value, sysobjid.id, len);
       break;
     case 3: /* sysUpTime */
       {
@@ -2215,13 +2183,13 @@ system_get_value(struct obj_def *od, u16_t len, void *value)
       }
       break;
     case 4: /* sysContact */
-      ocstrncpy((u8_t*)value, syscontact_ptr, len);
+      MEMCPY(value, syscontact_ptr, len);
       break;
     case 5: /* sysName */
-      ocstrncpy((u8_t*)value, sysname_ptr, len);
+      MEMCPY(value, sysname_ptr, len);
       break;
     case 6: /* sysLocation */
-      ocstrncpy((u8_t*)value, syslocation_ptr, len);
+      MEMCPY(value, syslocation_ptr, len);
       break;
     case 7: /* sysServices */
       {
@@ -2279,15 +2247,15 @@ system_set_value(struct obj_def *od, u16_t len, void *value)
   switch (id)
   {
     case 4: /* sysContact */
-      ocstrncpy(syscontact_ptr, (u8_t*)value, len);
+      MEMCPY(syscontact_ptr, value, len);
       *syscontact_len_ptr = (u8_t)len;
       break;
     case 5: /* sysName */
-      ocstrncpy(sysname_ptr, (u8_t*)value, len);
+      MEMCPY(sysname_ptr, value, len);
       *sysname_len_ptr = (u8_t)len;
       break;
     case 6: /* sysLocation */
-      ocstrncpy(syslocation_ptr, (u8_t*)value, len);
+      MEMCPY(syslocation_ptr, value, len);
       *syslocation_len_ptr = (u8_t)len;
       break;
   };
@@ -2475,7 +2443,7 @@ ifentry_get_value(struct obj_def *od, u16_t len, void *value)
       }
       break;
     case 2: /* ifDescr */
-      ocstrncpy((u8_t*)value, (u8_t*)netif->name, len);
+      MEMCPY(value, netif->name, len);
       break;
     case 3: /* ifType */
       {
@@ -2496,7 +2464,7 @@ ifentry_get_value(struct obj_def *od, u16_t len, void *value)
       }
       break;
     case 6: /* ifPhysAddress */
-      ocstrncpy((u8_t*)value, netif->hwaddr, len);
+      MEMCPY(value, netif->hwaddr, len);
       break;
     case 7: /* ifAdminStatus */
       {
@@ -2608,7 +2576,7 @@ ifentry_get_value(struct obj_def *od, u16_t len, void *value)
       }
       break;
     case 22: /* ifSpecific */
-      objectidncpy((s32_t*)value, (s32_t*)ifspecific.id, (u8_t)(len / sizeof(s32_t)));
+      MEMCPY(value, ifspecific.id, len);
       break;
   };
 }
@@ -3352,7 +3320,7 @@ ip_rteentry_get_value(struct obj_def *od, u16_t len, void *value)
         }
         break;
       case 13: /* ipRouteInfo */
-        objectidncpy((s32_t*)value, (s32_t*)iprouteinfo.id, (u8_t)(len / sizeof(s32_t)));
+        MEMCPY(value, iprouteinfo.id, len);
         break;
     }
   }