diff --git a/src/os/win32/ngx_user.h b/src/os/win32/ngx_user.h
index 6e8c58b..fd30df2 100644
--- a/src/os/win32/ngx_user.h
+++ b/src/os/win32/ngx_user.h
@@ -17,7 +17,7 @@
 #define ngx_gid_t  ngx_int_t
 
 
-ngx_int_t ngx_crypt(ngx_pool_t *pool, u_char *key, u_char *salt,
+ngx_int_t ngx_libc_crypt(ngx_pool_t *pool, u_char *key, u_char *salt,
     u_char **encrypted);