diff --git a/aidl.cpp b/aidl.cpp
index 344649d..5b1295d 100644
--- a/aidl.cpp
+++ b/aidl.cpp
@@ -664,30 +664,18 @@
         return AidlError::BAD_METHOD_ID;
       }
     }
-    // Verify and resolve the constant declarations
-    for (const auto& constant : defined_type->GetConstantDeclarations()) {
-      switch (constant->GetValue().GetType()) {
-        case AidlConstantValue::Type::STRING:    // fall-through
-        case AidlConstantValue::Type::REF:       // fall-through
-        case AidlConstantValue::Type::INT8:      // fall-through
-        case AidlConstantValue::Type::INT32:     // fall-through
-        case AidlConstantValue::Type::INT64:     // fall-through
-        case AidlConstantValue::Type::FLOATING:  // fall-through
-        case AidlConstantValue::Type::UNARY:     // fall-through
-        case AidlConstantValue::Type::BINARY: {
-          bool success = constant->CheckValid(*typenames);
-          if (!success) {
-            return AidlError::BAD_TYPE;
-          }
-          if (constant->ValueString(cpp::ConstantValueDecorator).empty()) {
-            return AidlError::BAD_TYPE;
-          }
-          break;
+    // Verify the var/const declarations.
+    // const expressions should be non-empty when evaluated with the var/const type.
+    if (!is_check_api) {
+      for (const auto& constant : defined_type->GetConstantDeclarations()) {
+        if (constant->ValueString(AidlConstantValueDecorator).empty()) {
+          return AidlError::BAD_TYPE;
         }
-        default:
-          AIDL_FATAL(constant) << "Unrecognized constant type: "
-                               << static_cast<int>(constant->GetValue().GetType());
-          break;
+      }
+      for (const auto& var : defined_type->GetFields()) {
+        if (var->GetDefaultValue() && var->ValueString(AidlConstantValueDecorator).empty()) {
+          return AidlError::BAD_TYPE;
+        }
       }
     }
   }
diff --git a/aidl_unittest.cpp b/aidl_unittest.cpp
index 03b7d66..5079296 100644
--- a/aidl_unittest.cpp
+++ b/aidl_unittest.cpp
@@ -1038,6 +1038,17 @@
   EXPECT_EQ(AidlError::BAD_TYPE, error);
 }
 
+TEST_F(AidlTest, BoolConstantsEvaluatesToIntegers) {
+  io_delegate_.SetFileContents("a/Foo.aidl", "package a; parcelable Foo { const int y = true; }");
+  CaptureStderr();
+  auto options = Options::From("aidl --lang java -o out a/Foo.aidl");
+  EXPECT_EQ(0, aidl::compile_aidl(options, io_delegate_));
+  EXPECT_EQ("", GetCapturedStderr());
+  string code;
+  EXPECT_TRUE(io_delegate_.GetWrittenContents("out/a/Foo.java", &code));
+  EXPECT_THAT(code, testing::HasSubstr("public static final int y = 1;"));
+}
+
 TEST_P(AidlTest, FailOnManyDefinedTypes) {
   AidlError error;
   const string expected_stderr =