diff --git a/src/ipc.cpp b/src/ipc.cpp
index 2abcaa59..d87a125f 100644
--- a/src/ipc.cpp
+++ b/src/ipc.cpp
@@ -1,4 +1,5 @@
 #include <fcntl.h>
+#include <unistd.h>
 
 #include <algorithm>
 #include <cstdlib>