diff --git a/packages/generator/src/compiler.ts b/packages/generator/src/compiler.ts
index ec3d849..9ca8708 100644
--- a/packages/generator/src/compiler.ts
+++ b/packages/generator/src/compiler.ts
@@ -827,7 +827,7 @@ export class PrismaAppSyncCompiler {
 
     // Return relation kind (`one` or `many`) from Prisma type
     private getFieldRelationKind(field: DMMF.Field): 'one' | 'many' {
-        return field.relationFromFields && field.relationFromFields.length === 1 ? 'one' : 'many'
+        return !field.isList ? 'one' : 'many'
     }
 
     // Get AppSync scalar from Prisma type