diff --git a/webrtc/modules/audio_processing/splitting_filter.cc b/webrtc/modules/audio_processing/splitting_filter.cc
index 5e93408ad5..adb82f60d8 100644
--- a/webrtc/modules/audio_processing/splitting_filter.cc
+++ b/webrtc/modules/audio_processing/splitting_filter.cc
@@ -31,7 +31,7 @@ SplittingFilter::SplittingFilter(int channels)
 }
 
 void SplittingFilter::Analysis(const IFChannelBuffer* in_data,
-                               std::vector<IFChannelBuffer*>& bands) {
+                               const std::vector<IFChannelBuffer*>& bands) {
   DCHECK(bands.size() == 2 || bands.size() == 3);
   DCHECK_EQ(channels_, in_data->num_channels());
   for (size_t i = 0; i < bands.size(); ++i) {
diff --git a/webrtc/modules/audio_processing/splitting_filter.h b/webrtc/modules/audio_processing/splitting_filter.h
index 66e85be6bc..119375b51d 100644
--- a/webrtc/modules/audio_processing/splitting_filter.h
+++ b/webrtc/modules/audio_processing/splitting_filter.h
@@ -57,7 +57,7 @@ class SplittingFilter {
   SplittingFilter(int channels);
 
   void Analysis(const IFChannelBuffer* in_data,
-                std::vector<IFChannelBuffer*>& bands);
+                const std::vector<IFChannelBuffer*>& bands);
   void Synthesis(const std::vector<IFChannelBuffer*>& bands,
                  IFChannelBuffer* out_data);