--- ifilterstreambuf/ifilterstreambuf.orig	2013-10-02 13:57:01 UTC
+++ ifilterstreambuf/ifilterstreambuf
@@ -1,6 +1,10 @@
 #ifndef INCLUDED_BOBCAT_IFILTERSTREAMBUF_
 #define INCLUDED_BOBCAT_IFILTERSTREAMBUF_
 
+#if defined(__FreeBSD__) || defined(__DragonFly__)
+#include <cstdio>
+#endif
+
 #include <streambuf>
 #include <memory>