diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index bb56356..a5e3e90 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
Binary files differ
diff --git a/src/version.c b/src/version.c
index 07a6093..e78066e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    992,
+/**/
     991,
 /**/
     990,
diff --git a/src/vim9cmds.c b/src/vim9cmds.c
index 06964d5..ecf31dc 100644
--- a/src/vim9cmds.c
+++ b/src/vim9cmds.c
@@ -2531,7 +2531,8 @@
     char_u	*p = arg;
     type_T	*stack_type;
 
-    if (*p != NUL && *p != '|' && *p != '\n')
+    if (*p != NUL && *p != '|' && *p != '\n'
+					&& (legacy || !vim9_comment_start(p)))
     {
 	// For a lambda, "return expr" is always used, also when "expr" results
 	// in a void.