diff --git a/include/asterisk/pbx.h b/include/asterisk/pbx.h
index 88479519c9..a5c3b2248a 100644
--- a/include/asterisk/pbx.h
+++ b/include/asterisk/pbx.h
@@ -29,6 +29,7 @@
 #include "asterisk/hashtab.h"
 #include "asterisk/stringfields.h"
 #include "asterisk/xmldoc.h"
+#include "asterisk/frame_defs.h"
 
 #if defined(__cplusplus) || defined(c_plusplus)
 extern "C" {