diff --git a/.changeset/orange-geckos-begin.md b/.changeset/orange-geckos-begin.md
new file mode 100644
index 000000000..c23f00d4e
--- /dev/null
+++ b/.changeset/orange-geckos-begin.md
@@ -0,0 +1,5 @@
+---
+'@lion/form-core': patch
+---
+
+Added submitGroup to types definition file for FormGroupMixin.
diff --git a/packages/form-core/types/form-group/FormGroupMixinTypes.d.ts b/packages/form-core/types/form-group/FormGroupMixinTypes.d.ts
index 2eb917c31..f27a6ba55 100644
--- a/packages/form-core/types/form-group/FormGroupMixinTypes.d.ts
+++ b/packages/form-core/types/form-group/FormGroupMixinTypes.d.ts
@@ -8,7 +8,8 @@ import { ValidateHost } from '../validate/ValidateMixinTypes';
 
 export declare class FormGroupHost {
   protected static _addDescriptionElementIdsToField(): void;
-  get _inputNode(): HTMLElement;
+  _inputNode: HTMLElement;
+  submitGroup(): void;
   resetGroup(): void;
   prefilled: boolean;
   touched: boolean;