diff --git a/include/just_gtfs/just_gtfs.h b/include/just_gtfs/just_gtfs.h
index 4077c02..349d472 100644
--- a/include/just_gtfs/just_gtfs.h
+++ b/include/just_gtfs/just_gtfs.h
@@ -999,6 +999,14 @@ struct FareAttributesItem
   size_t transfer_duration = 0;  // Length of time in seconds before a transfer expires
 };
 
+inline bool operator==(const FareAttributesItem & lhs, const FareAttributesItem & rhs)
+{
+  return std::tie(lhs.fare_id, lhs.price, lhs.currency_type, lhs.payment_method, lhs.transfers,
+                  lhs.agency_id, lhs.transfer_duration) ==
+         std::tie(rhs.fare_id, rhs.price, rhs.currency_type, rhs.payment_method, rhs.transfers,
+                  rhs.agency_id, rhs.transfer_duration);
+}
+
 // Optional dataset file
 struct FareRule
 {
@@ -1840,7 +1848,7 @@ inline Result Feed::add_fare_attributes(const ParsedCsvRow & row)
 
     item.currency_type = row.at("currency_type");
     set_field(item.payment_method, row, "payment_method", false);
-    set_field(item.transfers, row, "transfers", false);
+    set_field(item.transfers, row, "transfers");
 
     // Conditionally optional:
     item.agency_id = get_value_or_default(row, "agency_id");
@@ -2778,9 +2786,12 @@ inline void Feed::write_fare_attributes(std::ofstream & out) const
   for (const auto & attribute : fare_attributes)
   {
     std::vector<std::string> fields{
-        wrap(attribute.fare_id),          wrap(attribute.price),     attribute.currency_type,
-        wrap(attribute.payment_method),   wrap(attribute.transfers), wrap(attribute.agency_id),
-        wrap(attribute.transfer_duration)};
+        wrap(attribute.fare_id), wrap(attribute.price), attribute.currency_type,
+        wrap(attribute.payment_method),
+        // Here we handle GTFS specification corner case: "The fact that this field can be left
+        // empty is an exception to the requirement that a Required field must not be empty.":
+        attribute.transfers == FareTransfers::Unlimited ? "" : wrap(attribute.transfers),
+        wrap(attribute.agency_id), wrap(attribute.transfer_duration)};
     write_joined(out, std::move(fields));
   }
 }
diff --git a/tests/data/sample_feed/fare_attributes.txt b/tests/data/sample_feed/fare_attributes.txt
index 3ee7a99..22b7efb 100644
--- a/tests/data/sample_feed/fare_attributes.txt
+++ b/tests/data/sample_feed/fare_attributes.txt
@@ -1,3 +1,4 @@
 fare_id,price,currency_type,payment_method,transfers,transfer_duration
 p,1.25,USD,0,0,
-a,5.25,USD,0,0,
\ No newline at end of file
+a,5.25,USD,1,1,
+x,20,USD,0,,60
\ No newline at end of file
diff --git a/tests/unit_tests.cpp b/tests/unit_tests.cpp
index 4fc646e..8e738b5 100644
--- a/tests/unit_tests.cpp
+++ b/tests/unit_tests.cpp
@@ -310,7 +310,7 @@ TEST_CASE("Read GTFS feed")
   CHECK_EQ(feed.get_attributions().size(), 1);
   CHECK_EQ(feed.get_calendar().size(), 2);
   CHECK_EQ(feed.get_calendar_dates().size(), 1);
-  CHECK_EQ(feed.get_fare_attributes().size(), 2);
+  CHECK_EQ(feed.get_fare_attributes().size(), 3);
   CHECK_EQ(feed.get_fare_rules().size(), 4);
   CHECK(!feed.get_feed_info().feed_publisher_name.empty());
   CHECK_EQ(feed.get_levels().size(), 3);
@@ -494,7 +494,7 @@ TEST_CASE("Fare attributes")
   REQUIRE_EQ(feed.read_fare_attributes(), ResultCode::OK);
 
   const auto & attributes = feed.get_fare_attributes();
-  REQUIRE_EQ(attributes.size(), 2);
+  REQUIRE_EQ(attributes.size(), 3);
   CHECK_EQ(attributes[0].fare_id, "p");
   CHECK_EQ(attributes[0].price, 1.25);
   CHECK_EQ(attributes[0].currency_type, "USD");
@@ -502,9 +502,28 @@ TEST_CASE("Fare attributes")
   CHECK_EQ(attributes[0].transfers, FareTransfers::No);
   CHECK_EQ(attributes[0].transfer_duration, 0);
 
+  CHECK_EQ(attributes[1].fare_id, "a");
+  CHECK_EQ(attributes[1].price, 5.25);
+  CHECK_EQ(attributes[1].currency_type, "USD");
+  CHECK_EQ(attributes[1].payment_method, FarePayment::BeforeBoarding);
+  CHECK_EQ(attributes[1].transfers, FareTransfers::Once);
+  CHECK_EQ(attributes[1].transfer_duration, 0);
+
+  CHECK_EQ(attributes[2].fare_id, "x");
+  CHECK_EQ(attributes[2].price, 20);
+  CHECK_EQ(attributes[2].currency_type, "USD");
+  CHECK_EQ(attributes[2].payment_method, FarePayment::OnBoard);
+  CHECK_EQ(attributes[2].transfers, FareTransfers::Unlimited);
+  CHECK_EQ(attributes[2].transfer_duration, 60);
+
   const auto & attributes_for_id = feed.get_fare_attributes("a");
   REQUIRE_EQ(attributes_for_id.size(), 1);
   CHECK_EQ(attributes_for_id[0].price, 5.25);
+
+  REQUIRE_EQ(feed.write_fare_attributes("data/output_feed"), ResultCode::OK);
+  Feed feed_copy("data/output_feed");
+  REQUIRE_EQ(feed_copy.read_fare_attributes(), ResultCode::OK);
+  CHECK_EQ(attributes, feed_copy.get_fare_attributes());
 }
 
 TEST_CASE("Fare rules")