diff --git a/aom/aomcx.h b/aom/aomcx.h
index d789dd2..0f7a5b9 100644
--- a/aom/aomcx.h
+++ b/aom/aomcx.h
@@ -426,10 +426,12 @@
    * AV1 has a segment based feature that allows encoder to adaptively change
    * quantization parameter for each segment within a frame to improve the
    * subjective quality. This control makes encoder operate in one of the
-   * several AQ_modes supported.
+   * several AQ modes supported.
    *
    * - 0 = disable (default)
-   * - 1 = enable
+   * - 1 = variance
+   * - 2 = complexity
+   * - 3 = cyclic refresh
    */
   AV1E_SET_AQ_MODE = 40,