$NetBSD$

--- third_party/webrtc/modules/audio_coding/BUILD.gn.orig	2020-07-15 19:01:41.000000000 +0000
+++ third_party/webrtc/modules/audio_coding/BUILD.gn
@@ -482,7 +482,7 @@ rtc_library("isac_c") {
     "codecs/isac/main/source/transform.c",
   ]
 
-  if (is_linux) {
+  if (is_linux || is_bsd) {
     libs = [ "m" ]
   }