include errno.h

diff --git a/lib/header.c b/lib/header.c
index 0f00dff0460b5649fad8fe7dc76d15475c8d8385..90079f307b0ab38498e850a51165892b620991cf 100644 (file)
--- a/lib/header.c
+++ b/lib/header.c
@@ -16,6 +16,7 @@
 #include "lib/header_internal.h"
 #include "lib/misc.h"                  /* tag function proto */
 
+#include <errno.h>
 #include "debug.h"
 
 /** \ingroup header