diff --git a/chan_capi_chat.c b/chan_capi_chat.c
index 130f317..d1eb756 100644
--- a/chan_capi_chat.c
+++ b/chan_capi_chat.c
@@ -16,6 +16,7 @@
 #include <errno.h>
 #include <sys/signal.h>
 #include <sys/time.h>
+#include <ctype.h>
 
 #include "chan_capi_platform.h"
 #include "chan_capi20.h"
@@ -502,7 +503,11 @@ static void chat_handle_events(struct ast_channel *c, struct capi_pvt *i,
 				/* ignore NULL frame */
 				cc_verbose(5, 1, VERBOSE_PREFIX_3 "%s: chat: NULL frame, ignoring.\n",
 					i->vname);
+#ifdef CC_AST_HAS_VERSION_1_4
 			} else if ((f->frametype == AST_FRAME_DTMF_END) && (voice_message == NULL))  {
+#else
+			} else if ((f->frametype == AST_FRAME_DTMF) && (voice_message == NULL))  {
+#endif
 				pbx_capi_voicecommand_process_digit(i, c, FRAME_SUBCLASS_INTEGER(f->subclass));
 			} else {
 				cc_verbose(3, 1, VERBOSE_PREFIX_3 "%s: chat: unhandled frame %d/%d.\n",