diff --git a/libavcodec/dcadec.c b/libavcodec/dcadec.c
index 1ba9863c62..548a5f9978 100644
--- a/libavcodec/dcadec.c
+++ b/libavcodec/dcadec.c
@@ -1808,7 +1808,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
             /* If downmixing to stereo, don't decode additional channels.
              * FIXME: Using the xch_disable flag for this doesn't seem right. */
             if (!s->xch_disable)
-                channels += s->xll_channels - s->xll_residual_channels;
+                channels = s->xll_channels;
         }
     }