diff --git a/samples/multidemo.c b/samples/multidemo.c
index 367ce39e1..788270a1d 100644
--- a/samples/multidemo.c
+++ b/samples/multidemo.c
@@ -1,6 +1,9 @@
 /*
  * Extended memory overlay demo program.
  *
+ * Shows how to combine multiple cc65 features
+ * incl. overlays and extended memory drivers.
+ *
  * 2012-17-07, Oliver Schmidt (ol.sc@web.de)
  *
  */
diff --git a/samples/overlaydemo.c b/samples/overlaydemo.c
index a3fb132e1..4022eedd1 100644
--- a/samples/overlaydemo.c
+++ b/samples/overlaydemo.c
@@ -1,6 +1,8 @@
 /*
  * Minimalistic overlay demo program.
  *
+ * Shows how to load overlay files from disk.
+ *
  * 2009-10-02, Oliver Schmidt (ol.sc@web.de)
  *
  */