diff --git a/src/lread.c b/src/lread.c
index ec23028c9f4..0c9bc140b73 100644
--- a/src/lread.c
+++ b/src/lread.c
@@ -61,6 +61,9 @@ Boston, MA 02111-1307, USA.  */
 #include <locale.h>
 #endif /* HAVE_SETLOCALE */
 
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
 #ifndef O_RDONLY
 #define O_RDONLY 0
 #endif