diff --git a/include/mbedtls/platform.h b/include/mbedtls/platform.h
index fb7bc1b..87e880f 100644
--- a/include/mbedtls/platform.h
+++ b/include/mbedtls/platform.h
@@ -135,7 +135,7 @@
 
 /*
  * The function pointers for calloc and free.
- * please see MBEDTLS_PLATFORM_STD_CALLOC and MBEDTLS_PLATFORM_STD_FREE
+ * Please see MBEDTLS_PLATFORM_STD_CALLOC and MBEDTLS_PLATFORM_STD_FREE
  * in mbedtls_config.h for more information about behaviour and requirements.
  */
 #if defined(MBEDTLS_PLATFORM_MEMORY)