diff --git a/apps/app_senddtmf.c b/apps/app_senddtmf.c
index a8731e5dd0..39de24f958 100755
--- a/apps/app_senddtmf.c
+++ b/apps/app_senddtmf.c
@@ -20,6 +20,7 @@
 #include <asterisk/translate.h>
 #include <asterisk/options.h>
 #include <asterisk/utils.h>
+#include <asterisk/app.h>
 #include <string.h>
 #include <stdlib.h>
 #include <pthread.h>