diff --git a/ssl/ssl_cipher.cc b/ssl/ssl_cipher.cc
index 1e5320c..0ed91d6 100644
--- a/ssl/ssl_cipher.cc
+++ b/ssl/ssl_cipher.cc
@@ -559,13 +559,13 @@
 bool ssl_cipher_get_evp_aead(const EVP_AEAD **out_aead,
                              size_t *out_mac_secret_len,
                              size_t *out_fixed_iv_len, const SSL_CIPHER *cipher,
-                             uint16_t version, int is_dtls) {
+                             uint16_t version, bool is_dtls) {
   *out_aead = NULL;
   *out_mac_secret_len = 0;
   *out_fixed_iv_len = 0;
 
-  const int is_tls12 = version == TLS1_2_VERSION && !is_dtls;
-  const int is_tls13 = version == TLS1_3_VERSION && !is_dtls;
+  const bool is_tls12 = version == TLS1_2_VERSION && !is_dtls;
+  const bool is_tls13 = version == TLS1_3_VERSION && !is_dtls;
 
   if (cipher->algorithm_mac == SSL_AEAD) {
     if (cipher->algorithm_enc == SSL_AES128GCM) {
@@ -649,7 +649,7 @@
   }
 }
 
-static bool is_cipher_list_separator(char c, int is_strict) {
+static bool is_cipher_list_separator(char c, bool is_strict) {
   if (c == ':') {
     return true;
   }