diff --git a/src/keepanno/java/com/android/tools/r8/keepanno/asm/KeepEdgeReader.java b/src/keepanno/java/com/android/tools/r8/keepanno/asm/KeepEdgeReader.java
index ed65592..fb229fb 100644
--- a/src/keepanno/java/com/android/tools/r8/keepanno/asm/KeepEdgeReader.java
+++ b/src/keepanno/java/com/android/tools/r8/keepanno/asm/KeepEdgeReader.java
@@ -54,7 +54,6 @@
 import com.android.tools.r8.keepanno.ast.KeepTypePattern;
 import com.google.common.collect.ImmutableList;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -746,9 +745,6 @@
         super.visitEnum(name, descriptor, value);
       }
       switch (value) {
-        case Kind.DEFAULT:
-          // The default value is obtained by not assigning a kind (e.g., null in the builder).
-          break;
         case Kind.ONLY_CLASS:
         case Kind.ONLY_MEMBERS:
         case Kind.CLASS_AND_MEMBERS:
@@ -1333,18 +1329,12 @@
     @Override
     boolean tryParse(String name, Object value) {
       if (name.equals(Item.methodName) && value instanceof String) {
-        String methodName = (String) value;
-        if (!Item.methodNameDefaultValue.equals(methodName)) {
-          getBuilder().setNamePattern(KeepMethodNamePattern.exact(methodName));
-        }
+        getBuilder().setNamePattern(KeepMethodNamePattern.exact((String) value));
         return true;
       }
       if (name.equals(Item.methodReturnType) && value instanceof String) {
-        String returnType = (String) value;
-        if (!Item.methodReturnTypeDefaultValue.equals(returnType)) {
-          getBuilder()
-              .setReturnTypePattern(KeepEdgeReaderUtils.methodReturnTypeFromString(returnType));
-        }
+        getBuilder()
+            .setReturnTypePattern(KeepEdgeReaderUtils.methodReturnTypeFromString((String) value));
         return true;
       }
       return false;
@@ -1360,9 +1350,6 @@
         return new StringArrayVisitor(
             annotationName,
             params -> {
-              if (Arrays.asList(Item.methodParametersDefaultValue).equals(params)) {
-                return;
-              }
               KeepMethodParametersPattern.Builder builder = KeepMethodParametersPattern.builder();
               for (String param : params) {
                 builder.addParameterTypePattern(KeepEdgeReaderUtils.typePatternFromString(param));
@@ -1412,20 +1399,14 @@
     @Override
     boolean tryParse(String name, Object value) {
       if (name.equals(Item.fieldName) && value instanceof String) {
-        String fieldName = (String) value;
-        if (!Item.fieldNameDefaultValue.equals(fieldName)) {
-          getBuilder().setNamePattern(KeepFieldNamePattern.exact(fieldName));
-        }
+        getBuilder().setNamePattern(KeepFieldNamePattern.exact((String) value));
         return true;
       }
       if (name.equals(Item.fieldType) && value instanceof String) {
-        String fieldType = (String) value;
-        if (!Item.fieldTypeDefaultValue.equals(fieldType)) {
-          getBuilder()
-              .setTypePattern(
-                  KeepFieldTypePattern.fromType(
-                      KeepEdgeReaderUtils.typePatternFromString(fieldType)));
-        }
+        getBuilder()
+            .setTypePattern(
+                KeepFieldTypePattern.fromType(
+                    KeepEdgeReaderUtils.typePatternFromString((String) value)));
         return true;
       }
       return false;
@@ -1610,9 +1591,6 @@
         super.visitEnum(name, descriptor, value);
       }
       switch (value) {
-        case Kind.DEFAULT:
-          // The default value is obtained by not assigning a kind (e.g., null in the builder).
-          break;
         case Kind.ONLY_CLASS:
         case Kind.ONLY_MEMBERS:
         case Kind.CLASS_AND_MEMBERS:
diff --git a/src/keepanno/java/com/android/tools/r8/keepanno/ast/AnnotationConstants.java b/src/keepanno/java/com/android/tools/r8/keepanno/ast/AnnotationConstants.java
index abea1c1..09ef4cf 100644
--- a/src/keepanno/java/com/android/tools/r8/keepanno/ast/AnnotationConstants.java
+++ b/src/keepanno/java/com/android/tools/r8/keepanno/ast/AnnotationConstants.java
@@ -130,24 +130,6 @@
     public static final String fieldAccess = "fieldAccess";
     public static final String fieldName = "fieldName";
     public static final String fieldType = "fieldType";
-
-    // Default values for the optional entries. The defaults should be chosen such that they do
-    // not coincide with any actual valid value. E.g., the empty string in place of a name or type.
-    // These must be 1:1 with the value defined on the actual annotation definition.
-    public static final String classNameDefault = "";
-    public static final Class<?> classConstantDefault = Object.class;
-
-    public static final String extendsClassNameDefault = "";
-    public static final Class<?> extendsClassConstantDefault = Object.class;
-
-    public static final String methodNameDefaultValue = "";
-    public static final String methodReturnTypeDefaultValue = "";
-
-    @SuppressWarnings("MutablePublicArray")
-    public static final String[] methodParametersDefaultValue = new String[] {""};
-
-    public static final String fieldNameDefaultValue = "";
-    public static final String fieldTypeDefaultValue = "";
   }
 
   public static final class Binding {
@@ -174,7 +156,6 @@
     public static final Class<KeepItemKind> CLASS = KeepItemKind.class;
     public static final String DESCRIPTOR = getDescriptor(CLASS);
 
-    public static final String DEFAULT = "DEFAULT";
     public static final String ONLY_CLASS = "ONLY_CLASS";
     public static final String ONLY_MEMBERS = "ONLY_MEMBERS";
     public static final String CLASS_AND_MEMBERS = "CLASS_AND_MEMBERS";