diff --git a/programs/aes/crypt_and_hash.c b/programs/aes/crypt_and_hash.c
index 0bee86f..a8026a3 100644
--- a/programs/aes/crypt_and_hash.c
+++ b/programs/aes/crypt_and_hash.c
@@ -19,7 +19,7 @@
  */
 
 /* Enable definition of fileno() even when compiling with -std=c99. Must be
- * set before config.h, which pulls in glibc's features.h indirectly.
+ * set before mbedtls_config.h, which pulls in glibc's features.h indirectly.
  * Harmless on other platforms. */
 #define _POSIX_C_SOURCE 200112L