diff --git a/applications/jpip/libopenjpip/sock_manager.c b/applications/jpip/libopenjpip/sock_manager.c
index 748791f2..2eb6c62b 100644
--- a/applications/jpip/libopenjpip/sock_manager.c
+++ b/applications/jpip/libopenjpip/sock_manager.c
@@ -34,6 +34,7 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>
+#include <unistd.h>
 #endif
 
 #include <stdio.h>