diff --git a/keymaster/4.0/IKeymasterDevice.hal b/keymaster/4.0/IKeymasterDevice.hal
index dfde060..1c6ae47 100644
--- a/keymaster/4.0/IKeymasterDevice.hal
+++ b/keymaster/4.0/IKeymasterDevice.hal
@@ -1254,7 +1254,8 @@
      * o PaddingMode::RSA_PSS.  For PSS-padded signature operations, the PSS salt length must match
      *   the size of the PSS digest selected.  The digest specified with Tag::DIGEST in inputParams
      *   on begin() must be used as the PSS digest algorithm, MGF1 must be used as the mask
-     *   generation function and SHA1 must be used as the MGF1 digest algorithm.
+     *   generation function and the digest specified with Tag:DIGEST in inputParams must also be
+     *   used as the MGF1 digest algorithm.
      *
      * o PaddingMode::RSA_OAEP.  The digest specified with Tag::DIGEST in inputParams on begin is
      *   used as the OAEP digest algorithm, MGF1 must be used as the mask generation function and