diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 18bd28c..eb3ae92 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -3269,7 +3269,6 @@
     if( operation->id != 0 )
         return( PSA_ERROR_BAD_STATE );
 
-    /* The requested algorithm must be one that can be processed by cipher. */
     if( ! PSA_ALG_IS_CIPHER( alg ) )
         return( PSA_ERROR_INVALID_ARGUMENT );
 
@@ -3495,7 +3494,6 @@
     psa_key_type_t key_type;
     size_t iv_length;
 
-    /* The requested algorithm must be one that can be processed by cipher. */
     if( ! PSA_ALG_IS_CIPHER( alg ) )
         return( PSA_ERROR_INVALID_ARGUMENT );