diff --git a/webrtc/modules/audio_coding/codecs/ilbc/smooth.c b/webrtc/modules/audio_coding/codecs/ilbc/smooth.c
index 269331cce4..ed879327c0 100644
--- a/webrtc/modules/audio_coding/codecs/ilbc/smooth.c
+++ b/webrtc/modules/audio_coding/codecs/ilbc/smooth.c
@@ -168,7 +168,7 @@ void WebRtcIlbcfix_Smooth(
       /* B_W32 is in Q30 ( B = 1 - ENH_A0/2 - A * w10/w00 ) */
       scale1 = 31-bitsw10;
       scale2 = 21-scale1;
-      w10prim = w10 * (1 << scale1);
+      w10prim = w10 == 0 ? 0 : w10 * (1 << scale1);
       w00prim = WEBRTC_SPL_SHIFT_W32(w00, -scale2);
       scale = bitsw00-scale2-15;