diff --git a/firefox.spec b/firefox.spec
index 41dbd1c..5ff352c 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -204,8 +204,9 @@ Patch05:        build-rhel7-lower-node-min-version.patch
 Patch06:        build-ppc64-abiv2.patch
 Patch07:        build-rhel7-nasm-dwarf.patch
 # Disable PipeWire support for PipeWire 0.2
-Patch08:       disable-pipewire.patch
-Patch09:       rhbz-2131158-webrtc-nss-fix.patch
+Patch08:        disable-pipewire.patch
+Patch09:        rhbz-2131158-webrtc-nss-fix.patch
+Patch10:        build-ffvpx.patch
 
 # -- Upstreamed patches --
 Patch51:       mozilla-bmo1170092.patch
@@ -1020,6 +1021,7 @@ clang -print-search-dirs
 %patch -P8 -p1 -b .disable-pipewire
 %endif
 %patch -P9 -p1 -b .rhbz-2131158-webrtc-nss-fix
+%patch -P10 -p1 -b .build-ffvpx
 
 # -- Upstreamed patches --
 %patch -P51 -p1 -b .mozilla-bmo1170092