1 files changed, 1 insertions, 0 deletions

diff --git a/flex.skl b/flex.skl
index b5ba1c2..caa1a89 100644
--- a/flex.skl
+++ b/flex.skl
@@ -218,6 +218,7 @@ m4preproc_include(`flexint.h')
 #include <iostream> 
 #include <errno.h>
 #include <cstdlib>
+#include <cstdio>
 #include <cstring>
 /* end standard C++ headers. */
 %endif