diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 6e2116c0ab..b3e7d9da6e 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -7253,6 +7253,11 @@ static int sip_answer(struct ast_channel *ast)
 	int res = 0;
 	struct sip_pvt *p = ast_channel_tech_pvt(ast);
 
+	if (!p) {
+		ast_debug(1, "Asked to answer channel %s without tech pvt; ignoring\n",
+				ast_channel_name(ast));
+		return res;
+	}
 	sip_pvt_lock(p);
 	if (ast_channel_state(ast) != AST_STATE_UP) {
 		try_suggested_sip_codec(p);
@@ -7422,6 +7427,12 @@ static int sip_senddigit_begin(struct ast_channel *ast, char digit)
 	struct sip_pvt *p = ast_channel_tech_pvt(ast);
 	int res = 0;
 
+	if (!p) {
+		ast_debug(1, "Asked to begin DTMF digit on channel %s with no pvt; ignoring\n",
+				ast_channel_name(ast));
+		return res;
+	}
+
 	sip_pvt_lock(p);
 	switch (ast_test_flag(&p->flags[0], SIP_DTMF)) {
 	case SIP_DTMF_INBAND:
@@ -7446,6 +7457,12 @@ static int sip_senddigit_end(struct ast_channel *ast, char digit, unsigned int d
 	struct sip_pvt *p = ast_channel_tech_pvt(ast);
 	int res = 0;
 
+	if (!p) {
+		ast_debug(1, "Asked to end DTMF digit on channel %s with no pvt; ignoring\n",
+				ast_channel_name(ast));
+		return res;
+	}
+
 	sip_pvt_lock(p);
 	switch (ast_test_flag(&p->flags[0], SIP_DTMF)) {
 	case SIP_DTMF_INFO:
@@ -7471,6 +7488,12 @@ static int sip_transfer(struct ast_channel *ast, const char *dest)
 	struct sip_pvt *p = ast_channel_tech_pvt(ast);
 	int res;
 
+	if (!p) {
+		ast_debug(1, "Asked to transfer channel %s with no pvt; ignoring\n",
+				ast_channel_name(ast));
+		return -1;
+	}
+
 	if (dest == NULL)	/* functions below do not take a NULL */
 		dest = "";
 	sip_pvt_lock(p);
@@ -7666,6 +7689,12 @@ static int sip_indicate(struct ast_channel *ast, int condition, const void *data
 	struct sip_pvt *p = ast_channel_tech_pvt(ast);
 	int res = 0;
 
+	if (!p) {
+		ast_debug(1, "Asked to indicate condition on channel %s with no pvt; ignoring\n",
+				ast_channel_name(ast));
+		return res;
+	}
+
 	sip_pvt_lock(p);
 	switch(condition) {
 	case AST_CONTROL_RINGING: