diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index 85d995a..7ff7e72 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -267,7 +267,7 @@
 // |SSL_set0_rbio| and |SSL_set0_wbio| instead.
 OPENSSL_EXPORT void SSL_set_bio(SSL *ssl, BIO *rbio, BIO *wbio);
 
-// SSL_set0_rbio configures |ssl| to write to |rbio|. It takes ownership of
+// SSL_set0_rbio configures |ssl| to read from |rbio|. It takes ownership of
 // |rbio|.
 //
 // Note that, although this function and |SSL_set0_wbio| may be called on the