diff --git a/webrtc/modules/audio_processing/aec/aec_core_mips.c b/webrtc/modules/audio_processing/aec/aec_core_mips.c
index 4f5f1171f8..0a975f766b 100644
--- a/webrtc/modules/audio_processing/aec/aec_core_mips.c
+++ b/webrtc/modules/audio_processing/aec/aec_core_mips.c
@@ -337,7 +337,6 @@ void WebRtcAec_FilterFar_mips(AecCore* aec, float yf[2][PART_LEN1]) {
     float* bIm = aec->wfBuf[1] + pos;
     float f0, f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11, f12, f13;
     int len = PART_LEN1 >> 1;
-    int len1 = PART_LEN1 & 1;
 
     __asm __volatile (
       ".set       push                                                \n\t"
diff --git a/webrtc/modules/audio_processing/aec/aec_rdft_mips.c b/webrtc/modules/audio_processing/aec/aec_rdft_mips.c
index 6e51d3a8e7..7e64e65716 100644
--- a/webrtc/modules/audio_processing/aec/aec_rdft_mips.c
+++ b/webrtc/modules/audio_processing/aec/aec_rdft_mips.c
@@ -271,8 +271,8 @@ static void bitrv2_128_mips(float* a) {
 static void cft1st_128_mips(float* a) {
   float f0, f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11, f12, f13, f14;
   int a_ptr, p1_rdft, p2_rdft, count;
-  float* first = rdft_wk3ri_first;
-  float* second = rdft_wk3ri_second;
+  const float* first = rdft_wk3ri_first;
+  const float* second = rdft_wk3ri_second;
 
   __asm __volatile (
     ".set       push                                                    \n\t"