diff --git a/src/fe-gtk/sexy-spell-entry.c b/src/fe-gtk/sexy-spell-entry.c
index cd4850be..87fa6582 100644
--- a/src/fe-gtk/sexy-spell-entry.c
+++ b/src/fe-gtk/sexy-spell-entry.c
@@ -36,6 +36,8 @@
 #ifdef WIN32
 #include "typedef.h"
 #include <io.h>
+#else
+#include <unistd.h>
 #endif
 
 #include "../common/cfgfiles.h"