diff --git a/ssl/tls13_enc.c b/ssl/tls13_enc.c
index b5306eb78cd2a361aceb6a938ca22e8b61030057..698b9be5ca67587a795d3bbb0de39700363820a9 100644
--- a/ssl/tls13_enc.c
+++ b/ssl/tls13_enc.c
@@ -290,7 +290,7 @@ int tls13_change_cipher_state(SSL *s, int which)
     unsigned char *finsecret = NULL;
     EVP_CIPHER_CTX *ciph_ctx;
     const EVP_CIPHER *ciph = s->s3->tmp.new_sym_enc;
-    size_t ivlen, keylen, finsecretlen;
+    size_t ivlen, keylen, finsecretlen = 0;
     const unsigned char *label;
     size_t labellen;
     int ret = 0;