diff --git a/src/modules/echo-cancel/module-echo-cancel.c b/src/modules/echo-cancel/module-echo-cancel.c
index dfd05b64..2d6696ec 100644
--- a/src/modules/echo-cancel/module-echo-cancel.c
+++ b/src/modules/echo-cancel/module-echo-cancel.c
@@ -407,7 +407,8 @@ static int source_process_msg_cb(pa_msgobject *o, int code, void *data, int64_t
              * make sure we don't access it in that time. Also, the
              * source output is first shut down, the source second. */
             if (!PA_SOURCE_IS_LINKED(u->source->thread_info.state) ||
-                !PA_SOURCE_OUTPUT_IS_LINKED(u->source_output->thread_info.state)) {
+                !PA_SOURCE_OUTPUT_IS_LINKED(u->source_output->thread_info.state) ||
+                !u->source_output->source) {
                 *((pa_usec_t*) data) = 0;
                 return 0;
             }
@@ -443,7 +444,8 @@ static int sink_process_msg_cb(pa_msgobject *o, int code, void *data, int64_t of
              * make sure we don't access it in that time. Also, the
              * sink input is first shut down, the sink second. */
             if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
-                !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state)) {
+                !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state) ||
+                !u->sink_input->sink) {
                 *((pa_usec_t*) data) = 0;
                 return 0;
             }