diff --git a/packages/gatsby/src/schema/node-model.js b/packages/gatsby/src/schema/node-model.js
index 98193bb13e5c1..ec5922b485079 100644
--- a/packages/gatsby/src/schema/node-model.js
+++ b/packages/gatsby/src/schema/node-model.js
@@ -557,7 +557,7 @@ async function resolveRecursive(
   fieldsToResolve
 ) {
   const gqlFields = getFields(schema, type, node)
-  let resolvedFields = {}
+  const resolvedFields = {}
   for (const fieldName of Object.keys(fieldsToResolve)) {
     const fieldToResolve = fieldsToResolve[fieldName]
     const queryField = queryFields[fieldName]
@@ -667,7 +667,7 @@ const determineResolvableFields = (
     const gqlField = gqlFields[fieldName]
     const gqlFieldType = getNamedType(gqlField.type)
     const typeComposer = schemaComposer.getAnyTC(type.name)
-    let possibleTCs = [
+    const possibleTCs = [
       typeComposer,
       ...nodeTypeNames.map(name => schemaComposer.getAnyTC(name)),
     ]
diff --git a/packages/gatsby/src/schema/schema.js b/packages/gatsby/src/schema/schema.js
index 9a9fa235248b6..1340d93b2df00 100644
--- a/packages/gatsby/src/schema/schema.js
+++ b/packages/gatsby/src/schema/schema.js
@@ -184,11 +184,7 @@ const processTypeComposer = async ({
       fieldExtensions,
       parentSpan,
     })
-    await determineSearchableFields({
-      schemaComposer,
-      typeComposer,
-      parentSpan,
-    })
+
     if (typeComposer.hasInterface(`Node`)) {
       await addNodeInterfaceFields({ schemaComposer, typeComposer, parentSpan })
       await addImplicitConvenienceChildrenFields({
@@ -197,6 +193,14 @@ const processTypeComposer = async ({
         nodeStore,
         parentSpan,
       })
+    }
+    await determineSearchableFields({
+      schemaComposer,
+      typeComposer,
+      parentSpan,
+    })
+
+    if (typeComposer.hasInterface(`Node`)) {
       await addTypeToRootQuery({ schemaComposer, typeComposer, parentSpan })
     }
   } else if (typeComposer instanceof InterfaceTypeComposer) {