diff --git a/source/blender/makesrna/intern/rna_define.c b/source/blender/makesrna/intern/rna_define.c
index bd449acc050..0ef89490b3d 100644
--- a/source/blender/makesrna/intern/rna_define.c
+++ b/source/blender/makesrna/intern/rna_define.c
@@ -2249,7 +2249,6 @@ int rna_parameter_size(PropertyRNA *parm)
 #endif
 			}
 			case PROP_COLLECTION:
-				/* XXX does not work yet */
 				return sizeof(ListBase);
 		}
 	}