--- a/crates/jrsonnet-parser/src/lib.rs
+++ b/crates/jrsonnet-parser/src/lib.rs
@@ -630,10 +630,12 @@
 					el!(
 						Apply(
 							el!(
-								Index(
-									el!(Var("std".into()), 1, 4),
-									el!(Str("deepJoin".into()), 5, 13)
-								),
+								Index{
+									indexable: el!(Var("std".into()), 1, 4),
+									index: el!(Str("deepJoin".into()), 5, 13),
+									#[cfg(feature = "exp-null-coaelse")]
+									null_coaelse: false,
+								},
 								1,
 								13
 							),