diff --git a/src/interlingua/AllIna.gf b/src/interlingua/AllIna.gf
index 810c0772..e43c52ae 100644
--- a/src/interlingua/AllIna.gf
+++ b/src/interlingua/AllIna.gf
@@ -1,3 +1,3 @@
 --# -path=.:../abstract:../common:../prelude
 
-concrete AllIna of AllInaAbs = LangIna ;
+concrete AllIna of AllInaAbs = LangIna, ExtendIna ;
diff --git a/src/interlingua/ExtendIna.gf b/src/interlingua/ExtendIna.gf
new file mode 100644
index 00000000..ae7d1f47
--- /dev/null
+++ b/src/interlingua/ExtendIna.gf
@@ -0,0 +1,9 @@
+--# -path=.:../abstract:../common:prelude
+concrete ExtendIna of Extend = CatIna **
+  ExtendFunctor
+  with (Grammar = GrammarIna)
+    ** {
+
+  flags coding=utf8 ;
+
+}