1 files changed, 3 insertions, 1 deletions
diff --git a/parser.l b/parser.l
index c1013c87..c629e481 100644
--- a/parser.l
+++ b/parser.l
@@ -35,8 +35,10 @@
 #include <dirent.h>
 #include <wchar.h>
 #include <setjmp.h>
-#include <unistd.h>
 #include "config.h"
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
 #include "lib.h"
 #include "y.tab.h"
 #include "gc.h"