diff --git a/mongoose.c b/mongoose.c
index 0ad41538ad93aa39afa10cda77252e3320db021e..9edc710bbebe7e8026ae7ad06fda26530bb4eae0 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -1722,6 +1722,20 @@ const char *c_strnstr(const char *s, const char *find, size_t slen) {
   return NULL;
 }
 
+/*
+ * ARM C Compiler doesn't have strdup, so we provide it
+ */
+#if defined(__ARMCC_VERSION)
+char *strdup(const char *src) {
+  size_t len = strlen(src) + 1;
+  char *ret = malloc(len);
+  if (ret != NULL) {
+    strcpy(ret, src);
+  }
+  return ret;
+}
+#endif
+
 #endif /* EXCLUDE_COMMON */
 #ifdef MG_MODULE_LINES
 #line 1 "mongoose/src/net.c"
@@ -10012,6 +10026,22 @@ int gettimeofday(struct timeval *tp, void *tzp) {
 
 #endif /* CS_PLATFORM == CS_P_MSP432 */
 #ifdef MG_MODULE_LINES
+#line 1 "common/platforms/nrf5/nrf5_libc.c"
+#endif
+/*
+ * Copyright (c) 2014-2016 Cesanta Software Limited
+ * All rights reserved
+ */
+
+#if CS_PLATFORM == CS_P_NRF52 && defined(__ARMCC_VERSION)
+int gettimeofday(struct timeval *tp, void *tzp) {
+  /* TODO */
+  tp->tv_sec = 0;
+  tp->tv_usec = 0;
+  return 0;
+}
+#endif
+#ifdef MG_MODULE_LINES
 #line 1 "common/platforms/simplelink/sl_fs_slfs.h"
 #endif
 /*
@@ -11348,7 +11378,7 @@ void mg_lwip_mgr_schedule_poll(struct mg_mgr *mgr);
 # define TCP_NEW tcp_new_ip6
 # define TCP_BIND tcp_bind_ip6
 # define UDP_BIND udp_bind_ip6
-# define IPADDR_NTOA ip6addr_ntoa
+# define IPADDR_NTOA(x) ip6addr_ntoa((const ip6_addr_t *)(x))
 # define SET_ADDR(dst, src)                                \
     memcpy((dst)->sin6.sin6_addr.s6_addr, (src)->ip6.addr, \
            sizeof((dst)->sin6.sin6_addr.s6_addr))
diff --git a/mongoose.h b/mongoose.h
index ae34e781061619565078c7942d5b603cc6f2f858..a6d1aa5423bf213775d6d391b652d19495b00c04 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -850,11 +850,18 @@ int inet_pton(int af, const char *src, void *dst);
 #define to64(x) strtoll(x, NULL, 10)
 
 #define MG_NET_IF             MG_NET_IF_LWIP_LOW_LEVEL
-#define LWIP_TIMEVAL_PRIVATE  0
 #define LWIP_PROVIDE_ERRNO    1
 #define MG_LWIP               1
 #define MG_ENABLE_IPV6        1
 
+/*
+ * For ARM C Compiler, make lwip to export `struct timeval`; for other
+ * compilers, suppress it.
+ */
+#if !defined(__ARMCC_VERSION)
+# define LWIP_TIMEVAL_PRIVATE  0
+#endif
+
 #define INT64_FMT PRId64
 #define SIZE_T_FMT "u"
 
@@ -1566,6 +1573,13 @@ int c_vsnprintf(char *buf, size_t buf_size, const char *format, va_list ap);
  */
 const char *c_strnstr(const char *s, const char *find, size_t slen);
 
+/*
+ * ARM C Compiler doesn't have strdup, so we provide it
+ */
+#if defined(__ARMCC_VERSION)
+char *strdup(const char *src);
+#endif
+
 #ifdef __cplusplus
 }
 #endif