diff --git a/eolian_cxx/colourable.eo b/eolian_cxx/colourable.eo
index 22bd59e4..9a28aac2 100644
--- a/eolian_cxx/colourable.eo
+++ b/eolian_cxx/colourable.eo
@@ -1,4 +1,4 @@
-class Colourable (Eo_Base)
+class Colourable (Eo.Base)
 {
     /*@ Colourable class. */
     legacy_prefix: legacy;