diff --git a/media/libopus/gen-sources.py b/media/libopus/gen-sources.py
index b4c101ac3e55..661c3ea7fb32 100644
--- a/media/libopus/gen-sources.py
+++ b/media/libopus/gen-sources.py
@@ -11,6 +11,7 @@ import re
 # These files are not used, ignore them.
 ignore_list = [
     'silk/float/regularize_correlations_FLP.c',
+    'silk/float/LPC_inv_pred_gain_FLP.c',
 ]
 
 def should_ignore(value):
diff --git a/media/libopus/sources.mozbuild b/media/libopus/sources.mozbuild
index 84064380f0d8..804df29a6f75 100644
--- a/media/libopus/sources.mozbuild
+++ b/media/libopus/sources.mozbuild
@@ -239,7 +239,6 @@ silk_sources_float = [
     'silk/float/inner_product_FLP.c',
     'silk/float/k2a_FLP.c',
     'silk/float/LPC_analysis_filter_FLP.c',
-    'silk/float/LPC_inv_pred_gain_FLP.c',
     'silk/float/LTP_analysis_filter_FLP.c',
     'silk/float/LTP_scale_ctrl_FLP.c',
     'silk/float/noise_shape_analysis_FLP.c',