diff --git a/channels/chan_dahdi.c b/channels/chan_dahdi.c
index 9ccec64..3976e43 100644
--- a/channels/chan_dahdi.c
+++ b/channels/chan_dahdi.c
@@ -8316,6 +8316,9 @@ static struct ast_frame *dahdi_read(struct ast_channel *ast)
 	 * the same private structure.
 	 */
 	p = ast_channel_tech_pvt(ast);
+	if (!p) {
+			return &ast_null_frame;
+	}
 	while (ast_mutex_trylock(&p->lock)) {
 		CHANNEL_DEADLOCK_AVOIDANCE(ast);
 
@@ -8774,6 +8777,11 @@ static int dahdi_write(struct ast_channel *ast, struct ast_frame *frame)
 	struct dahdi_pvt *p = ast_channel_tech_pvt(ast);
 	int res;
 	int idx;
+	if (!p) {
+		ast_log(LOG_WARNING, "%s doesn't really exist? (NULL pvt)\n",
+			ast_channel_name(ast));
+		return -1;
+	}
 	idx = dahdi_get_index(ast, p, 0);
 	if (idx < 0) {
 		ast_log(LOG_WARNING, "%s doesn't really exist?\n", ast_channel_name(ast));