diff --git a/programs/ssl/ssl_mail_client.c b/programs/ssl/ssl_mail_client.c
index 74d5d72..0f2b32d 100644
--- a/programs/ssl/ssl_mail_client.c
+++ b/programs/ssl/ssl_mail_client.c
@@ -19,8 +19,8 @@
  *  This file is part of mbed TLS (https://tls.mbed.org)
  */
 
-/* Enable definition of hostname() even when compiling with -std=c99. Must be
- * set before config.h, which pulls in glibc's features.h indirectly.
+/* Enable definition of gethostname() even when compiling with -std=c99. Must
+ * be set before config.h, which pulls in glibc's features.h indirectly.
  * Harmless on other platforms. */
 #define _POSIX_C_SOURCE 200112L