diff -urw firefox-60.7.0-old/media/audioipc/audioipc/src/cmsg.rs firefox-60.7.0/media/audioipc/audioipc/src/cmsg.rs
--- firefox-60.7.0-old/media/audioipc/audioipc/src/cmsg.rs	2019-05-24 13:35:24.210002353 +0000
+++ firefox-60.7.0/media/audioipc/audioipc/src/cmsg.rs	2019-05-24 13:36:34.400002547 +0000
@@ -108,6 +108,8 @@
 
             let cmsghdr = cmsghdr {
                 cmsg_len: cmsg_len as _,
+                #[cfg(all(target_env = "musl", target_pointer_width = "64"))]
+                __pad1: 0,
                 cmsg_level: level,
                 cmsg_type: kind,
             };