diff --git a/tremor-script/src/ast.rs b/tremor-script/src/ast.rs
index 5fd1a74b99..cf0f2f81f8 100644
--- a/tremor-script/src/ast.rs
+++ b/tremor-script/src/ast.rs
@@ -1364,7 +1364,7 @@ pub enum ArrayPredicatePattern<'script> {
     /// Expression
     Expr(ImutExprInt<'script>),
     /// Tilde predicate
-    Tilde(TestExpr),
+    Tilde(Box<TestExpr>),
     /// Nested record pattern
     Record(RecordPattern<'script>),
     /// Don't care condition
diff --git a/tremor-script/src/ast/raw.rs b/tremor-script/src/ast/raw.rs
index 0f0b6eba25..00fbd79f5a 100644
--- a/tremor-script/src/ast/raw.rs
+++ b/tremor-script/src/ast/raw.rs
@@ -1593,7 +1593,7 @@ impl<'script> Upable<'script> for ArrayPredicatePatternRaw<'script> {
         use ArrayPredicatePatternRaw::{Expr, Ignore, Record, Tilde};
         Ok(match self {
             Expr(expr) => ArrayPredicatePattern::Expr(expr.up(helper)?),
-            Tilde(te) => ArrayPredicatePattern::Tilde(te.up(helper)?),
+            Tilde(te) => ArrayPredicatePattern::Tilde(Box::new(te.up(helper)?)),
             Record(rp) => ArrayPredicatePattern::Record(rp.up(helper)?),
             Ignore => ArrayPredicatePattern::Ignore,
             //Array(ap) => ArrayPredicatePattern::Array(ap),