diff --git a/backend/src/main/resources/metadata-sources-ui-schema-oidc.json b/backend/src/main/resources/metadata-sources-ui-schema-oidc.json
index d463762e2..814153b01 100644
--- a/backend/src/main/resources/metadata-sources-ui-schema-oidc.json
+++ b/backend/src/main/resources/metadata-sources-ui-schema-oidc.json
@@ -8,7 +8,8 @@
     "protocol": {
       "title": "label.source-protocol",
       "description": "tooltip.source-protocol",
-      "type": "string"
+      "type": "string",
+      "default": "oidc"
     },
     "serviceProviderName": {
       "title": "label.service-provider-name",
diff --git a/backend/src/main/resources/metadata-sources-ui-schema-saml.json b/backend/src/main/resources/metadata-sources-ui-schema-saml.json
index 73bb04aec..4406d43ad 100644
--- a/backend/src/main/resources/metadata-sources-ui-schema-saml.json
+++ b/backend/src/main/resources/metadata-sources-ui-schema-saml.json
@@ -8,7 +8,8 @@
     "protocol": {
       "title": "label.source-protocol",
       "description": "tooltip.source-protocol",
-      "type": "string"
+      "type": "string",
+      "default": "saml"
     },
     "serviceProviderName": {
       "title": "label.service-provider-name",