diff --git a/crypto/rsa/rsa_gen.c b/crypto/rsa/rsa_gen.c
index 3d5a32a0a1..5712aa1791 100644
--- a/crypto/rsa/rsa_gen.c
+++ b/crypto/rsa/rsa_gen.c
@@ -463,7 +463,7 @@ static int rsa_keygen_pairwise_test(RSA *rsa, OSSL_CALLBACK *cb, void *cbarg)
     if (ciphertxt_len <= 0)
         goto err;
     if (ciphertxt_len == plaintxt_len
-        && memcmp(decoded, plaintxt, plaintxt_len) == 0)
+        && memcmp(ciphertxt, plaintxt, plaintxt_len) == 0)
         goto err;
 
     OSSL_SELF_TEST_oncorrupt_byte(st, ciphertxt);