diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 8acc377f4..9da758002 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -527,7 +527,7 @@
  *
  * Use only 128-bit keys in AES operations to save ROM.
  *
- * Uncommenting this macro removes support for AES operations that are using 192
+ * Uncommenting this macro removes support for AES operations that use 192-
  * or 256-bit keys.
  *
  * Tradeoff: Uncommenting this macro reduces ROM footprint by ~1116 bytes.