diff --git a/media/libopus/sources.mozbuild b/media/libopus/sources.mozbuild
--- a/media/libopus/sources.mozbuild
+++ b/media/libopus/sources.mozbuild
@@ -1,12 +1,11 @@
 # THIS FILE WAS AUTOMATICALLY GENERATED BY gen-sources.py. DO NOT EDIT.
 celt_sources = [
     'celt/bands.c',
-    'celt/celt.c',
     'celt/celt_lpc.c',
     'celt/cwrs.c',
     'celt/entcode.c',
     'celt/entdec.c',
     'celt/entenc.c',
     'celt/kiss_fft.c',
     'celt/laplace.c',
     'celt/mathops.c',
@@ -14,16 +13,18 @@ celt_sources = [
     'celt/modes.c',
     'celt/pitch.c',
     'celt/quant_bands.c',
     'celt/rate.c',
     'celt/vq.c',
 ]
 
 opus_nonunified_sources = [
+    # Disabled because of undefined reference to celt_fatal at link time
+    'celt/celt.c',
     # Disabled because of name clash of opus_custom_encoder_get_size.
     'celt/celt_decoder.c',
     'celt/celt_encoder.c',
     # Disabled for (safe) warning about QA redefinition.
     'silk/LPC_inv_pred_gain.c',
     'silk/NLSF2A.c',
 ]