diff --git a/vp9/encoder/vp9_encoder.c b/vp9/encoder/vp9_encoder.c
index 3e82a004c..0626f44a4 100644
--- a/vp9/encoder/vp9_encoder.c
+++ b/vp9/encoder/vp9_encoder.c
@@ -2792,12 +2792,12 @@ int vp9_get_compressed_data(VP9_COMP *cpi, unsigned int *frame_flags,
           cpi->totalp_sq_error += psnr2.sse[0];
           cpi->totalp_samples += psnr2.samples[0];
 
-          frame_ssim2 = vp9_calc_ssim(orig, recon, 1, &weight);
+          frame_ssim2 = vp9_calc_ssim(orig, recon, &weight);
 
           cpi->summed_quality += frame_ssim2 * weight;
           cpi->summed_weights += weight;
 
-          frame_ssim2 = vp9_calc_ssim(orig, &cm->post_proc_buffer, 1, &weight);
+          frame_ssim2 = vp9_calc_ssim(orig, &cm->post_proc_buffer, &weight);
 
           cpi->summedp_quality += frame_ssim2 * weight;
           cpi->summedp_weights += weight;
diff --git a/vp9/encoder/vp9_ssim.c b/vp9/encoder/vp9_ssim.c
index 026e6a8fd..8435640c8 100644
--- a/vp9/encoder/vp9_ssim.c
+++ b/vp9/encoder/vp9_ssim.c
@@ -95,7 +95,7 @@ double vp9_ssim2(uint8_t *img1, uint8_t *img2, int stride_img1,
   return ssim_total;
 }
 double vp9_calc_ssim(YV12_BUFFER_CONFIG *source, YV12_BUFFER_CONFIG *dest,
-                     int lumamask, double *weight) {
+                     double *weight) {
   double a, b, c;
   double ssimv;
 
diff --git a/vp9/encoder/vp9_ssim.h b/vp9/encoder/vp9_ssim.h
index a581c2c23..d1dd1b722 100644
--- a/vp9/encoder/vp9_ssim.h
+++ b/vp9/encoder/vp9_ssim.h
@@ -18,7 +18,7 @@ extern "C" {
 #include "vpx_scale/yv12config.h"
 
 double vp9_calc_ssim(YV12_BUFFER_CONFIG *source, YV12_BUFFER_CONFIG *dest,
-                     int lumamask, double *weight);
+                     double *weight);
 
 double vp9_calc_ssimg(YV12_BUFFER_CONFIG *source, YV12_BUFFER_CONFIG *dest,
                       double *ssim_y, double *ssim_u, double *ssim_v);