diff --git a/src/EFCore.Cosmos/Query/Internal/SqlExpressionFactory.cs b/src/EFCore.Cosmos/Query/Internal/SqlExpressionFactory.cs
index b4cfb0938a5..48808848457 100644
--- a/src/EFCore.Cosmos/Query/Internal/SqlExpressionFactory.cs
+++ b/src/EFCore.Cosmos/Query/Internal/SqlExpressionFactory.cs
@@ -156,7 +156,7 @@ private SqlExpression ApplyTypeMappingOnSqlBinary(
             case ExpressionType.Coalesce:
             {
                 inferredTypeMapping = typeMapping ?? ExpressionExtensions.InferTypeMapping(left, right);
-                resultType = inferredTypeMapping?.ClrType ?? left.Type;
+                resultType = inferredTypeMapping?.ClrType ?? (left.Type != typeof(object) ? left.Type : right.Type);
                 resultTypeMapping = inferredTypeMapping;
                 break;
             }