diff --git a/spdl/SPORE/ccitt509-1c.spdl b/spdl/SPORE/ccitt509-1c.spdl
index 2317a69..e6fc1db 100644
--- a/spdl/SPORE/ccitt509-1c.spdl
+++ b/spdl/SPORE/ccitt509-1c.spdl
@@ -29,7 +29,7 @@ protocol ccitt5091c(I,R)
 		var Ta: Timestamp;
         var Na,Xa,Ya: Nonce;
 
-		read_2(I,R, I,{Ta, Na, R, Xa,{Ya,{hash(Ya)}sk(I)}pk(R)}sk(I));
+		read_1(I,R, I,{Ta, Na, R, Xa,{Ya,{hash(Ya)}sk(I)}pk(R)}sk(I));
 		claim_3(R,Nisynch);
         # There should also be Fresh Xa and Fresh Ya claims here
 	}