diff --git a/datafusion/expr/src/conditional_expressions.rs b/datafusion/expr/src/conditional_expressions.rs
index 8910b2e9b56a..d02f522910c1 100644
--- a/datafusion/expr/src/conditional_expressions.rs
+++ b/datafusion/expr/src/conditional_expressions.rs
@@ -23,6 +23,7 @@ use datafusion_common::{plan_err, DFSchema, HashSet, Result};
 use itertools::Itertools as _;
 
 /// Helper struct for building [Expr::Case]
+#[derive(Debug, Clone)]
 pub struct CaseBuilder {
     expr: Option<Box<Expr>>,
     when_expr: Vec<Expr>,