diff --git a/src/video_engine/test/auto_test/source/vie_autotest_image_process.cc b/src/video_engine/test/auto_test/source/vie_autotest_image_process.cc
index 887fe6ea9..745f35dc9 100644
--- a/src/video_engine/test/auto_test/source/vie_autotest_image_process.cc
+++ b/src/video_engine/test/auto_test/source/vie_autotest_image_process.cc
@@ -200,10 +200,12 @@ void ViEAutoTest::ViEImageProcessAPITest()
     // Denoising
     //
     EXPECT_EQ(0, ViE.image_process->EnableDenoising(tbCapture.captureId, true));
-    EXPECT_NE(0, ViE.image_process->EnableDenoising(tbCapture.captureId, true));
+    // If the denoising is already enabled, it will just reuturn 0.
+    EXPECT_EQ(0, ViE.image_process->EnableDenoising(tbCapture.captureId, true));
     EXPECT_EQ(0, ViE.image_process->EnableDenoising(
         tbCapture.captureId, false));
-    EXPECT_NE(0, ViE.image_process->EnableDenoising(
+    // If the denoising is already disabled, it will just reuturn 0.
+    EXPECT_EQ(0, ViE.image_process->EnableDenoising(
         tbCapture.captureId, false));
     EXPECT_NE(0, ViE.image_process->EnableDenoising(
         tbChannel.videoChannel, true));
diff --git a/src/video_engine/vie_capturer.cc b/src/video_engine/vie_capturer.cc
index 6da16eb4b..23793fd25 100644
--- a/src/video_engine/vie_capturer.cc
+++ b/src/video_engine/vie_capturer.cc
@@ -448,9 +448,8 @@ WebRtc_Word32 ViECapturer::EnableDenoising(bool enable) {
   CriticalSectionScoped cs(deliver_cs_.get());
   if (enable) {
     if (denoising_enabled_) {
-      WEBRTC_TRACE(kTraceError, kTraceVideo, ViEId(engine_id_, capture_id_),
-                   "%s: denoising already enabled", __FUNCTION__);
-      return -1;
+      // Already enabled, nothing need to be done.
+      return 0;
     }
     denoising_enabled_ = true;
     if (IncImageProcRefCount() != 0) {
@@ -458,9 +457,8 @@ WebRtc_Word32 ViECapturer::EnableDenoising(bool enable) {
     }
   } else {
     if (denoising_enabled_ == false) {
-      WEBRTC_TRACE(kTraceError, kTraceVideo, ViEId(engine_id_, capture_id_),
-                   "%s: denoising not enabled", __FUNCTION__);
-      return -1;
+      // Already disabled, nothing need to be done.
+      return 0;
     }
     denoising_enabled_ = false;
     DecImageProcRefCount();