diff --git a/src/modules/audio_coding/main/source/acm_isac.cc b/src/modules/audio_coding/main/source/acm_isac.cc
index 37ebe0915c..e242792131 100644
--- a/src/modules/audio_coding/main/source/acm_isac.cc
+++ b/src/modules/audio_coding/main/source/acm_isac.cc
@@ -376,7 +376,7 @@ static WebRtc_Word16
 ACMISACFixGetNewBitstream(
     ACM_ISAC_STRUCT* inst,
     WebRtc_Word16    BWEIndex,
-    WebRtc_Word16    jitterIndex,
+    WebRtc_Word16    /* jitterIndex */,
     WebRtc_Word32    rate,
     WebRtc_Word16*   bitStream,
     bool             isRED)