diff --git a/webrtc/modules/audio_processing/high_pass_filter_impl.cc b/webrtc/modules/audio_processing/high_pass_filter_impl.cc
index dc412e7e36..43c3754bdf 100644
--- a/webrtc/modules/audio_processing/high_pass_filter_impl.cc
+++ b/webrtc/modules/audio_processing/high_pass_filter_impl.cc
@@ -59,20 +59,16 @@ int Filter(FilterState* hpf, int16_t* data, int length) {
     //  y[i] = b[0] * x[i] + b[1] * x[i-1] + b[2] * x[i-2]
     //         + -a[1] * y[i-1] + -a[2] * y[i-2];
 
-    tmp_int32 =
-        WEBRTC_SPL_MUL_16_16(y[1], ba[3]); // -a[1] * y[i-1] (low part)
-    tmp_int32 +=
-        WEBRTC_SPL_MUL_16_16(y[3], ba[4]); // -a[2] * y[i-2] (low part)
+    tmp_int32 = y[1] * ba[3];  // -a[1] * y[i-1] (low part)
+    tmp_int32 += y[3] * ba[4];  // -a[2] * y[i-2] (low part)
     tmp_int32 = (tmp_int32 >> 15);
-    tmp_int32 +=
-        WEBRTC_SPL_MUL_16_16(y[0], ba[3]); // -a[1] * y[i-1] (high part)
-    tmp_int32 +=
-        WEBRTC_SPL_MUL_16_16(y[2], ba[4]); // -a[2] * y[i-2] (high part)
+    tmp_int32 += y[0] * ba[3];  // -a[1] * y[i-1] (high part)
+    tmp_int32 += y[2] * ba[4];  // -a[2] * y[i-2] (high part)
     tmp_int32 = (tmp_int32 << 1);
 
-    tmp_int32 += WEBRTC_SPL_MUL_16_16(data[i], ba[0]); // b[0]*x[0]
-    tmp_int32 += WEBRTC_SPL_MUL_16_16(x[0], ba[1]);    // b[1]*x[i-1]
-    tmp_int32 += WEBRTC_SPL_MUL_16_16(x[1], ba[2]);    // b[2]*x[i-2]
+    tmp_int32 += data[i] * ba[0];  // b[0]*x[0]
+    tmp_int32 += x[0] * ba[1];  // b[1]*x[i-1]
+    tmp_int32 += x[1] * ba[2];  // b[2]*x[i-2]
 
     // Update state (input part)
     x[1] = x[0];