diff --git a/lib/hcrypto/evp-openssl.c b/lib/hcrypto/evp-openssl.c
index 179b385b7..d7d71e4ff 100644
--- a/lib/hcrypto/evp-openssl.c
+++ b/lib/hcrypto/evp-openssl.c
@@ -158,7 +158,7 @@ cipher_do_cipher(hc_EVP_CIPHER_CTX *ctx, unsigned char *out,
     struct ossl_cipher_ctx *ossl_ctx = ctx->cipher_data;
 
     assert(ossl_ctx != NULL);
-    return EVP_Cipher(ossl_ctx->ossl_cipher_ctx, out, in, len);
+    return EVP_Cipher(ossl_ctx->ossl_cipher_ctx, out, in, len) == 0 ? 0 : 1;
 }
 
 static int