diff --git a/src/autofit/aflatin2.c b/src/autofit/aflatin2.c
index 1fab85e8d..5db4a4114 100644
--- a/src/autofit/aflatin2.c
+++ b/src/autofit/aflatin2.c
@@ -1,3 +1,8 @@
+/* ATTENTION: This file doesn't compile.  It is only here as a reference */
+/*            of an alternative latin hinting algorithm that was always  */
+/*            marked as experimental.                                    */
+
+
 /***************************************************************************/
 /*                                                                         */
 /*  aflatin2.c                                                             */
diff --git a/src/autofit/aflatin2.h b/src/autofit/aflatin2.h
index c17a6a2a3..f83f70428 100644
--- a/src/autofit/aflatin2.h
+++ b/src/autofit/aflatin2.h
@@ -1,3 +1,8 @@
+/* ATTENTION: This file doesn't compile.  It is only here as a reference */
+/*            of an alternative latin hinting algorithm that was always  */
+/*            marked as experimental.                                    */
+
+
 /***************************************************************************/
 /*                                                                         */
 /*  aflatin2.h                                                             */