diff --git a/bsd-user/bsd-file.h b/bsd-user/bsd-file.h
index 93e142d46e..a4c6dd52a2 100644
--- a/bsd-user/bsd-file.h
+++ b/bsd-user/bsd-file.h
@@ -429,4 +429,31 @@ static abi_long do_bsd_unlinkat(abi_long arg1, abi_long arg2,
     return ret;
 }
 
+/* mkdir(2) */
+static abi_long do_bsd_mkdir(abi_long arg1, abi_long arg2)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg1);
+    ret = get_errno(mkdir(p, arg2)); /* XXX path(p) */
+    UNLOCK_PATH(p, arg1);
+
+    return ret;
+}
+
+/* mkdirat(2) */
+static abi_long do_bsd_mkdirat(abi_long arg1, abi_long arg2,
+        abi_long arg3)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg2);
+    ret = get_errno(mkdirat(arg1, p, arg3));
+    UNLOCK_PATH(p, arg2);
+
+    return ret;
+}
+
 #endif /* BSD_FILE_H */
diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c
index c847e4d20c..9381ddb5be 100644
--- a/bsd-user/freebsd/os-syscall.c
+++ b/bsd-user/freebsd/os-syscall.c
@@ -333,6 +333,14 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
         ret = do_bsd_unlinkat(arg1, arg2, arg3);
         break;
 
+    case TARGET_FREEBSD_NR_mkdir: /* mkdir(2) */
+        ret = do_bsd_mkdir(arg1, arg2);
+        break;
+
+    case TARGET_FREEBSD_NR_mkdirat: /* mkdirat(2) */
+        ret = do_bsd_mkdirat(arg1, arg2, arg3);
+        break;
+
     default:
         qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
         ret = -TARGET_ENOSYS;