diff --git a/libs/libvpx/vp8/encoder/onyx_if.c b/libs/libvpx/vp8/encoder/onyx_if.c
index c091594121..00bab3f626 100644
--- a/libs/libvpx/vp8/encoder/onyx_if.c
+++ b/libs/libvpx/vp8/encoder/onyx_if.c
@@ -1447,6 +1447,11 @@ void vp8_change_config(VP8_COMP *cpi, VP8_CONFIG *oxcf) {
   last_h = cpi->oxcf.Height;
   prev_number_of_layers = cpi->oxcf.number_of_layers;
 
+  if (cpi->initial_width) {
+      // TODO(https://crbug.com/1486441): Allow changing thread counts; the
+      // allocation is done once in vp8_create_compressor().
+      oxcf->multi_threaded = cpi->oxcf.multi_threaded;
+  }
   cpi->oxcf = *oxcf;
 
   switch (cpi->oxcf.Mode) {