diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
index 5cb8dbdde3..3af1190cf0 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
@@ -35,7 +35,7 @@ class IntelligibilityEnhancer : public LappedTransform::Callback {
                           size_t num_render_channels,
                           size_t num_noise_bins);
 
-  ~IntelligibilityEnhancer();
+  ~IntelligibilityEnhancer() override;
 
   // Sets the capture noise magnitude spectrum estimate.
   void SetCaptureNoiseEstimate(std::vector<float> noise, float gain);
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc b/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc
index dfa912b31f..6e641a2332 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc
@@ -56,6 +56,8 @@ GainApplier::GainApplier(size_t freqs, float relative_change_limit)
       target_(freqs, 1.f),
       current_(freqs, 1.f) {}
 
+GainApplier::~GainApplier() {}
+
 void GainApplier::Apply(const std::complex<float>* in_block,
                         std::complex<float>* out_block) {
   for (size_t i = 0; i < num_freqs_; ++i) {
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h b/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
index 11b9e49bd4..b5cc075140 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
@@ -48,6 +48,8 @@ class GainApplier {
  public:
   GainApplier(size_t freqs, float relative_change_limit);
 
+  ~GainApplier();
+
   // Copy |in_block| to |out_block|, multiplied by the current set of gains,
   // and step the current set of gains towards the target set.
   void Apply(const std::complex<float>* in_block,