minor changes

1 files changed, 5 insertions, 0 deletions

diff --git a/pssr.h b/pssr.h
index 4ba29509..0bdf3156 100644
--- a/pssr.h
+++ b/pssr.h
@@ -36,6 +36,11 @@ template <class H> struct EMSA2HashId
 // EMSA2HashId can be instantiated with the following two classes.
 class SHA;
 class RIPEMD160;
+class RIPEMD128;
+class SHA256;
+class SHA384;
+class SHA512;
+class Whirlpool;
 
 template <class BASE>
 class EMSA2HashIdLookup : public BASE