diff --git a/pc/dtmfsender.cc b/pc/dtmfsender.cc
index 8378eb9a07..1fde7bf236 100644
--- a/pc/dtmfsender.cc
+++ b/pc/dtmfsender.cc
@@ -141,7 +141,7 @@ bool DtmfSender::InsertDtmf(const std::string& tones, int duration,
   // Clear the previous queue.
   signaling_thread_->Clear(this, MSG_DO_INSERT_DTMF);
   // Kick off a new DTMF task queue.
-  signaling_thread_->Post(RTC_FROM_HERE, this, MSG_DO_INSERT_DTMF);
+  signaling_thread_->PostDelayed(RTC_FROM_HERE, 1, this, MSG_DO_INSERT_DTMF);
   return true;
 }
 
diff --git a/pc/dtmfsender_unittest.cc b/pc/dtmfsender_unittest.cc
index ddccc448f6..48f2bee259 100644
--- a/pc/dtmfsender_unittest.cc
+++ b/pc/dtmfsender_unittest.cc
@@ -335,3 +335,15 @@ TEST_F(DtmfSenderTest, InsertDtmfWithInvalidDurationOrGap) {
 
   EXPECT_TRUE(dtmf_->InsertDtmf(tones, duration, inter_tone_gap));
 }
+
+TEST_F(DtmfSenderTest, InsertDtmfSendsAfterWait) {
+  std::string tones = "ABC";
+  int duration = 100;
+  int inter_tone_gap = 50;
+  EXPECT_TRUE(dtmf_->InsertDtmf(tones, duration, inter_tone_gap));
+  VerifyExpectedState(track_, "ABC", duration, inter_tone_gap);
+  // Wait until the first tone got sent.
+  EXPECT_TRUE_SIMULATED_WAIT(observer_->tones().size() == 1, kMaxWaitMs,
+                             fake_clock_);
+  VerifyExpectedState(track_, "BC", duration, inter_tone_gap);
+}