diff --git a/server/main.cpp b/server/main.cpp
index 8f07389..f61c017 100644
--- a/server/main.cpp
+++ b/server/main.cpp
@@ -16,6 +16,7 @@
 #include <sys/stat.h>
 #include <sys/mman.h>
 #include <assert.h>
+#include <errno.h>
 
 #if 0
 //TODO: Switch xHD client to Z8530 built-in CRC calc