diff --git a/web-app/src/routes/settings/providers/index.tsx b/web-app/src/routes/settings/providers/index.tsx
index b22487390..7b9afd905 100644
--- a/web-app/src/routes/settings/providers/index.tsx
+++ b/web-app/src/routes/settings/providers/index.tsx
@@ -39,7 +39,7 @@ function ModelProviders() {
         toast.error(t('providerAlreadyExists', { name }))
         return
       }
-      const newProvider = {
+      const newProvider: ProviderObject = {
         provider: name,
         active: true,
         models: [],
diff --git a/web-app/src/types/modelProviders.d.ts b/web-app/src/types/modelProviders.d.ts
index bf79f401c..2225adee0 100644
--- a/web-app/src/types/modelProviders.d.ts
+++ b/web-app/src/types/modelProviders.d.ts
@@ -48,7 +48,7 @@ type ProviderObject = {
   settings: ProviderSetting[]
   models: Model[]
   persist?: boolean
-  custom_header: ProviderCustomHeader[] | null
+  custom_header?: ProviderCustomHeader[] | null
 }
 
 /**