diff --git a/tools/aapt2/cmd/Util.cpp b/tools/aapt2/cmd/Util.cpp
index e839fc1..7739171 100644
--- a/tools/aapt2/cmd/Util.cpp
+++ b/tools/aapt2/cmd/Util.cpp
@@ -137,22 +137,25 @@
       diag->Error(android::DiagMessage() << "No name given for one or more flags in: " << arg);
       return false;
     }
+
     std::vector<std::string> name_parts = util::Split(flag_name, ':');
     if (name_parts.size() > 2) {
       diag->Error(android::DiagMessage()
                   << "Invalid feature flag and optional value '" << flag_and_value
-                  << "'. Must be in the format 'flag_name[:ro][=true|false]");
+                  << "'. Must be in the format 'flag_name[:READ_ONLY|READ_WRITE][=true|false]");
       return false;
     }
     flag_name = name_parts[0];
     bool read_only = false;
     if (name_parts.size() == 2) {
-      if (name_parts[1] == "ro") {
+      if (name_parts[1] == "ro" || name_parts[1] == "READ_ONLY") {
         read_only = true;
+      } else if (name_parts[1] == "READ_WRITE") {
+        read_only = false;
       } else {
         diag->Error(android::DiagMessage()
                     << "Invalid feature flag and optional value '" << flag_and_value
-                    << "'. Must be in the format 'flag_name[:ro][=true|false]");
+                    << "'. Must be in the format 'flag_name[:READ_ONLY|READ_WRITE][=true|false]");
         return false;
       }
     }
diff --git a/tools/aapt2/cmd/Util_test.cpp b/tools/aapt2/cmd/Util_test.cpp
index 35bc637..7818340 100644
--- a/tools/aapt2/cmd/Util_test.cpp
+++ b/tools/aapt2/cmd/Util_test.cpp
@@ -383,7 +383,7 @@
 TEST(UtilTest, ParseFeatureFlagsParameter_DuplicateFlag) {
   auto diagnostics = test::ContextBuilder().Build()->GetDiagnostics();
   FeatureFlagValues feature_flag_values;
-  ASSERT_TRUE(ParseFeatureFlagsParameter("foo=true,bar=true,foo:ro=false", diagnostics,
+  ASSERT_TRUE(ParseFeatureFlagsParameter("foo=true,bar:READ_WRITE=true,foo:ro=false", diagnostics,
                                          &feature_flag_values));
   EXPECT_THAT(
       feature_flag_values,
@@ -394,11 +394,11 @@
 TEST(UtilTest, ParseFeatureFlagsParameter_Valid) {
   auto diagnostics = test::ContextBuilder().Build()->GetDiagnostics();
   FeatureFlagValues feature_flag_values;
-  ASSERT_TRUE(ParseFeatureFlagsParameter("foo= true, bar:ro =FALSE,baz=, quux", diagnostics,
-                                         &feature_flag_values));
+  ASSERT_TRUE(ParseFeatureFlagsParameter("foo:READ_ONLY= true, bar:ro =FALSE,baz:READ_WRITE=, quux",
+                                         diagnostics, &feature_flag_values));
   EXPECT_THAT(
       feature_flag_values,
-      UnorderedElementsAre(Pair("foo", FeatureFlagProperties{false, std::optional<bool>(true)}),
+      UnorderedElementsAre(Pair("foo", FeatureFlagProperties{true, std::optional<bool>(true)}),
                            Pair("bar", FeatureFlagProperties{true, std::optional<bool>(false)}),
                            Pair("baz", FeatureFlagProperties{false, std::nullopt}),
                            Pair("quux", FeatureFlagProperties{false, std::nullopt})));