1 files changed, 1 insertions, 0 deletions
diff --git a/common.h b/common.h
index 0e132a1..b720a03 100644
--- a/common.h
+++ b/common.h
@@ -1,6 +1,7 @@
 /* See LICENSE file for copyright and license details. */
 #include "libautomata.h"
 
+#include <errno.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>