diff --git a/types/hapi__joi/hapi__joi-tests.ts b/types/hapi__joi/hapi__joi-tests.ts
index 381c04c156..18bc21b9e3 100644
--- a/types/hapi__joi/hapi__joi-tests.ts
+++ b/types/hapi__joi/hapi__joi-tests.ts
@@ -1159,6 +1159,13 @@ schema = Joi.symbol().map({
 
 // --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
 
+const rule = Joi.string().case('upper').$_getRule('case');
+if (rule && rule.args) {
+    const direction = rule.args.direction;
+}
+
+// --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
+
 schema = Joi.any();
 const terms = schema.$_terms;
 
diff --git a/types/hapi__joi/index.d.ts b/types/hapi__joi/index.d.ts
index 542ebaae07..2ccd02c3c6 100644
--- a/types/hapi__joi/index.d.ts
+++ b/types/hapi__joi/index.d.ts
@@ -726,6 +726,13 @@ declare namespace Joi {
         };
     }
 
+    interface GetRuleOptions {
+        args?: Record<string, any>;
+        method?: string;
+        name: string;
+        operator?: string;
+    }
+
     interface SchemaInternals {
         /**
          * Parent schema object.
@@ -767,7 +774,7 @@ declare namespace Joi {
         /**
          * Retrieve some rule configuration.
          */
-        $_getRule(name: string): ExtensionRule;
+        $_getRule(name: string): GetRuleOptions | undefined;
 
         $_mapLabels(path: string | string[]): string;