diff --git a/include/mbedtls/chacha20.h b/include/mbedtls/chacha20.h
index 25e1a26..8af16ed 100644
--- a/include/mbedtls/chacha20.h
+++ b/include/mbedtls/chacha20.h
@@ -38,7 +38,8 @@
 #include <stdint.h>
 #include <stddef.h>
 
-#define MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA         -0x0051 /**< Invalid input parameter(s). */
+/** Invalid input parameter(s). */
+#define MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA         -0x0051
 
 #ifdef __cplusplus
 extern "C" {