diff --git a/lib/zebra.h b/lib/zebra.h
index d9c28b0..7d907ed 100644
--- a/lib/zebra.h
+++ b/lib/zebra.h
@@ -228,6 +228,7 @@
 #endif  /* !__GNUC__ || VTYSH_EXTRACT_PL */
 
 #include "zassert.h"
+#include "str.h"
 
 
 #ifdef HAVE_BROKEN_CMSG_FIRSTHDR