diff --git a/libs/gst/controller/gstdirectcontrolbinding.c b/libs/gst/controller/gstdirectcontrolbinding.c
index 8cfd027a40..960408f70a 100644
--- a/libs/gst/controller/gstdirectcontrolbinding.c
+++ b/libs/gst/controller/gstdirectcontrolbinding.c
@@ -207,7 +207,7 @@ gst_direct_control_binding_constructor (GType type, guint n_construct_params,
 
     GST_DEBUG ("  using type %s", g_type_name (base));
 
-    // select mapping function
+    /* select mapping function */
     switch (base) {
       case G_TYPE_INT:
         self->convert_g_value = convert_g_value_to_int;
diff --git a/libs/gst/controller/gsttimedvaluecontrolsource.h b/libs/gst/controller/gsttimedvaluecontrolsource.h
index d6624ed5c3..06577cb301 100644
--- a/libs/gst/controller/gsttimedvaluecontrolsource.h
+++ b/libs/gst/controller/gsttimedvaluecontrolsource.h
@@ -66,7 +66,7 @@ struct _GstControlPoint
   /* internal fields */
 
   /* Caches for the interpolators */
-  // FIXME: we should not have this here already ...
+  /* FIXME: we should not have this here already ... */
   union {
     struct {
       gdouble h;