1 files changed, 2 insertions, 1 deletions
diff --git a/main.cc b/main.cc
index e9c16a9..bba5c6a 100644
--- a/main.cc
+++ b/main.cc
@@ -9,7 +9,7 @@
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */
 /*
-    Return values: 0 for a normal exit, 1 for environmental problems
+    Exit status: 0 for a normal exit, 1 for environmental problems
     (file not found, invalid flags, I/O errors, etc), 2 to indicate a
     corrupt or invalid input file.
 */
@@ -22,6 +22,7 @@
 #include <stdint.h>
 #include <unistd.h>
 #if defined(__MSVCRT__) || defined(__OS2__)
+#include <fcntl.h>
 #include <io.h>
 #endif