diff --git a/src/Make_ami.mak b/src/Make_ami.mak
index a642d91..9e9ebe3 100644
--- a/src/Make_ami.mak
+++ b/src/Make_ami.mak
@@ -174,6 +174,7 @@
 	userfunc.c \
 	version.c \
 	viminfo.c \
+	vim9class.c \
 	vim9cmds.c \
 	vim9compile.c \
 	vim9execute.c \