diff --git a/src/interlingua/LangIna.gf b/src/interlingua/LangIna.gf
index 5db8de3c7..eee858363 100644
--- a/src/interlingua/LangIna.gf
+++ b/src/interlingua/LangIna.gf
@@ -3,6 +3,7 @@
 concrete LangIna of Lang = 
   GrammarIna,
   LexiconIna,
+  ConstructionIna,
   DocumentationIna
   ** {