diff --git a/core/src/sql/function.rs b/core/src/sql/function.rs
index 6b55be2d..5a528c99 100644
--- a/core/src/sql/function.rs
+++ b/core/src/sql/function.rs
@@ -275,6 +275,7 @@ impl Function {
 				// Check for any final optional arguments
 				val.args.iter().rev().for_each(|(_, kind)| match kind {
 					Kind::Option(_) if min_args_len == 0 => {}
+					Kind::Any if min_args_len == 0 => {}
 					_ => min_args_len += 1,
 				});
 				// Check the necessary arguments are passed
diff --git a/sdk/tests/function.rs b/sdk/tests/function.rs
index 1f3bfd5d..0d123beb 100644
--- a/sdk/tests/function.rs
+++ b/sdk/tests/function.rs
@@ -6340,17 +6340,20 @@ pub async fn function_http_disabled() -> Result<(), Error> {
 #[tokio::test]
 async fn function_custom_optional_args() -> Result<(), Error> {
 	let sql = r#"
+		DEFINE FUNCTION fn::any_arg($a: any) { $a || 'test' };
 		DEFINE FUNCTION fn::zero_arg() { [] };
 		DEFINE FUNCTION fn::one_arg($a: bool) { [$a] };
 		DEFINE FUNCTION fn::last_option($a: bool, $b: option<bool>) { [$a, $b] };
 		DEFINE FUNCTION fn::middle_option($a: bool, $b: option<bool>, $c: bool) { [$a, $b, $c] };
 
+		RETURN fn::any_arg();
 		RETURN fn::zero_arg();
 		RETURN fn::one_arg();
 		RETURN fn::last_option();
 		RETURN fn::middle_option();
 
 		RETURN fn::zero_arg(true);
+		RETURN fn::any_arg('other');
 		RETURN fn::one_arg(true);
 		RETURN fn::last_option(true);
 		RETURN fn::last_option(true, false);
@@ -6376,6 +6379,14 @@ async fn function_custom_optional_args() -> Result<(), Error> {
 	assert_eq!(tmp, val);
 	//
 	let tmp = test.next()?.result?;
+	let val = Value::None;
+	assert_eq!(tmp, val);
+	//
+	let tmp = test.next()?.result?;
+	let val = Value::parse("'test'");
+	assert_eq!(tmp, val);
+	//
+	let tmp = test.next()?.result?;
 	let val = Value::parse("[]");
 	assert_eq!(tmp, val);
 	//
@@ -6416,6 +6427,10 @@ async fn function_custom_optional_args() -> Result<(), Error> {
 	}
 	//
 	let tmp = test.next()?.result?;
+	let val = Value::parse("'other'");
+	assert_eq!(tmp, val);
+	//
+	let tmp = test.next()?.result?;
 	let val = Value::parse("[true]");
 	assert_eq!(tmp, val);
 	//