diff --git a/src/core/ngx_inet.c b/src/core/ngx_inet.c
new file mode 100644
index 0000000..aba990b
--- /dev/null
+++ b/src/core/ngx_inet.c
@@ -0,0 +1,18 @@
+
+#include <ngx_config.h>
+#include <ngx_string.h>
+#include <ngx_inet.h>
+
+
+size_t ngx_inet_ntop(int family, char *addr, char *text, size_t len)
+{
+    if (family != AF_INET)
+        return 0;
+
+    return ngx_snprintf(text, len > INET_ADDRSTRLEN ? INET_ADDRSTRLEN : len,
+                        "%u.%u.%u.%u",
+                        (unsigned char) addr[0],
+                        (unsigned char) addr[1],
+                        (unsigned char) addr[2],
+                        (unsigned char) addr[3]);
+}