diff --git a/stepmania/src/ezsockets.cpp b/stepmania/src/ezsockets.cpp
index e367181fb9..772ac786c5 100644
--- a/stepmania/src/ezsockets.cpp
+++ b/stepmania/src/ezsockets.cpp
@@ -18,6 +18,7 @@
 #else
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <unistd.h>
 #include <arpa/inet.h>
 #endif