diff --git a/gtk/gtkapplication.c b/gtk/gtkapplication.c
index 59c081bea1..90d4adfca8 100644
--- a/gtk/gtkapplication.c
+++ b/gtk/gtkapplication.c
@@ -22,7 +22,9 @@
 #include "config.h"
 
 #include <stdlib.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <string.h>
 
 #include "gtkapplication.h"