diff --git a/packages/ui/components/input-file/src/LionInputFile.js b/packages/ui/components/input-file/src/LionInputFile.js
index eff762bf3..12bbf4ae7 100644
--- a/packages/ui/components/input-file/src/LionInputFile.js
+++ b/packages/ui/components/input-file/src/LionInputFile.js
@@ -427,13 +427,15 @@ export class LionInputFile extends ScopedElementsMixin(LocalizeMixin(LionField))
               // eslint-disable-next-line no-param-reassign
               file.validationFeedback = [
                 {
-                  type: response.errorMessage?.length > 0 ? 'error' : 'success',
-                  message: response.errorMessage,
+                  type:
+                    typeof response.errorMessage === 'string' && response.errorMessage?.length > 0
+                      ? 'error'
+                      : 'success',
+                  message: response.errorMessage ?? '',
                 },
               ];
             }
           });
-          // this._selectedFilesMetaData = [...this._selectedFilesMetaData];
         }
       });
     }
diff --git a/packages/ui/components/input-file/types/input-file.d.ts b/packages/ui/components/input-file/types/input-file.ts
similarity index 80%
rename from packages/ui/components/input-file/types/input-file.d.ts
rename to packages/ui/components/input-file/types/input-file.ts
index 048554e0e..88d6e5723 100644
--- a/packages/ui/components/input-file/types/input-file.d.ts
+++ b/packages/ui/components/input-file/types/input-file.ts
@@ -1,6 +1,6 @@
 import { FeedbackMessage } from "../../form-core/types/validate/ValidateMixinTypes.js";
 
-type FileBasics = {
+export type FileBasics = {
   name: string;
   /** size in bytes */
   size: number;
@@ -10,7 +10,7 @@ type FileBasics = {
 
 export type InputFile = {
   downloadUrl?: string;
-  errorMessage?: FeedbackMessage.message;
+  errorMessage?: FeedbackMessage["message"];
   failedProp?: Array<string|number>;
   response?: UploadResponse;
   systemFile: Partial<SystemFile>;
@@ -19,7 +19,7 @@ export type InputFile = {
 
 export type SystemFile = {
   downloadUrl?: string;
-  errorMessage?: FeedbackMessage.message;
+  errorMessage?: FeedbackMessage["message"];
   failedProp?: Array<string|number>;
   response?: UploadResponse;
 } & FileBasics & Partial<File>;
@@ -27,6 +27,6 @@ export type SystemFile = {
 
 export type UploadResponse = {
   downloadUrl?: string;
-  errorMessage?: FeedbackMessage.message;
+  errorMessage?: FeedbackMessage["message"];
   id?: string;
 } & Partial<FileBasics>;
diff --git a/packages/ui/exports/types/form-core.ts b/packages/ui/exports/types/form-core.ts
index 5f115331f..b76955ce5 100644
--- a/packages/ui/exports/types/form-core.ts
+++ b/packages/ui/exports/types/form-core.ts
@@ -14,5 +14,4 @@ export { FormRegistrarHost } from '../../components/form-core/types/registration
 export { ElementWithParentFormGroup } from '../../components/form-core/types/registration/FormRegistrarMixinTypes.js';
 export { FormRegistrarPortalHost } from '../../components/form-core/types/registration/FormRegistrarPortalMixinTypes.js';
 export { SyncUpdatableHost } from '../../components/form-core/types/utils/SyncUpdatableMixinTypes.js';
-export { ValidateHost } from '../../components/form-core/types/validate/ValidateMixinTypes.js';
-export { ValidationType } from '../../components/form-core/types/validate/ValidateMixinTypes.js';
+export { ValidateHost, ValidationType, FeedbackMessage } from '../../components/form-core/types/validate/ValidateMixinTypes.js';
diff --git a/packages/ui/exports/types/input-file.ts b/packages/ui/exports/types/input-file.ts
new file mode 100644
index 000000000..06669c09b
--- /dev/null
+++ b/packages/ui/exports/types/input-file.ts
@@ -0,0 +1 @@
+export { InputFile, SystemFile } from '../../components/input-file/types/input-file.js'