diff --git a/README.md b/README.md
index 80d4b4a..cbb8e91 100644
--- a/README.md
+++ b/README.md
@@ -95,6 +95,6 @@ Import as a Gradle dependency:
 
 ```groovy
 dependencies {
-    implementation("io.github.over-run:marshal:0.1.0-alpha.11-jdk22")
+    implementation("io.github.over-run:marshal:0.1.0-alpha.12-jdk22")
 }
 ```
diff --git a/gradle.properties b/gradle.properties
index 2c17ec0..0a1ed51 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -12,7 +12,7 @@ projGroupId=io.github.over-run
 projArtifactId=marshal
 # The project name should only contain lowercase letters, numbers and hyphen.
 projName=marshal
-projVersion=0.1.0-alpha.11-jdk22
+projVersion=0.1.0-alpha.12-jdk22
 projDesc=Marshaler of native libraries
 # Uncomment them if you want to publish to maven repository.
 projUrl=https://github.com/Over-Run/marshal
diff --git a/src/main/java/overrun/marshal/Downcall.java b/src/main/java/overrun/marshal/Downcall.java
index 013088f..52df4f6 100644
--- a/src/main/java/overrun/marshal/Downcall.java
+++ b/src/main/java/overrun/marshal/Downcall.java
@@ -394,11 +394,11 @@ private static Method findUpcallWrapper(Class<?> aClass) {
     }
 
     @SuppressWarnings("unchecked")
-    private static <T> T loadBytecode(Class<?> callerClass, SymbolLookup lookup, Map<String, FunctionDescriptor> descriptorMap) {
+    private static <T> T loadBytecode(Class<?> targetClass, SymbolLookup lookup, Map<String, FunctionDescriptor> descriptorMap) {
         final ClassFile cf = of();
-        final ClassDesc cd_thisClass = ClassDesc.of(callerClass.getPackageName(), DEFAULT_NAME);
+        final ClassDesc cd_thisClass = ClassDesc.of(targetClass.getPackageName(), DEFAULT_NAME);
         final byte[] bytes = cf.build(cd_thisClass, classBuilder -> {
-            final List<Method> methodList = Arrays.stream(callerClass.getMethods())
+            final List<Method> methodList = Arrays.stream(targetClass.getMethods())
                 .filter(method ->
                     method.getDeclaredAnnotation(Skip.class) == null &&
                     !Modifier.isStatic(method.getModifiers()))
@@ -425,7 +425,8 @@ private static <T> T loadBytecode(Class<?> callerClass, SymbolLookup lookup, Map
             classBuilder.withFlags(ACC_FINAL | ACC_SUPER);
 
             // interface
-            classBuilder.withInterfaceSymbols(callerClass.describeConstable().orElseThrow());
+            final ClassDesc cd_targetClass = targetClass.describeConstable().orElseThrow();
+            classBuilder.withInterfaceSymbols(cd_targetClass);
 
             // linker
             classBuilder.withField("$LINKER", CD_Linker, ACC_PRIVATE | ACC_FINAL | ACC_STATIC);
@@ -833,11 +834,10 @@ private static <T> T loadBytecode(Class<?> callerClass, SymbolLookup lookup, Map
                                     blockCodeBuilder -> {
                                         // invoke super interface
                                         invokeSuperMethod(blockCodeBuilder, parameters);
-                                        final Class<?> declaringClass = method.getDeclaringClass();
-                                        blockCodeBuilder.invokespecial(ClassDesc.ofDescriptor(declaringClass.descriptorString()),
+                                        blockCodeBuilder.invokespecial(cd_targetClass,
                                                 methodName,
                                                 mtd_method,
-                                                declaringClass.isInterface())
+                                                targetClass.isInterface())
                                             .areturn();
                                     });
                             } else {
@@ -854,11 +854,10 @@ private static <T> T loadBytecode(Class<?> callerClass, SymbolLookup lookup, Map
                                 blockCodeBuilder -> {
                                     // invoke super interface
                                     invokeSuperMethod(blockCodeBuilder, parameters);
-                                    final Class<?> declaringClass = method.getDeclaringClass();
-                                    blockCodeBuilder.invokespecial(declaringClass.describeConstable().orElseThrow(),
+                                    blockCodeBuilder.invokespecial(cd_targetClass,
                                         methodName,
                                         mtd_method,
-                                        declaringClass.isInterface()
+                                        targetClass.isInterface()
                                     ).returnInstruction(returnTypeKind);
                                 }
                             ).nop();
@@ -1049,7 +1048,7 @@ private static <T> T loadBytecode(Class<?> callerClass, SymbolLookup lookup, Map
         });
 
         try {
-            final MethodHandles.Lookup hiddenClass = MethodHandles.privateLookupIn(callerClass, MethodHandles.lookup())
+            final MethodHandles.Lookup hiddenClass = MethodHandles.privateLookupIn(targetClass, MethodHandles.lookup())
                 .defineHiddenClassWithClassData(bytes, Map.copyOf(descriptorMap), true, MethodHandles.Lookup.ClassOption.STRONG);
             return (T) hiddenClass.findConstructor(hiddenClass.lookupClass(), MethodType.methodType(void.class, SymbolLookup.class))
                 .invoke(lookup);
diff --git a/src/test/java/overrun/marshal/test/IndirectInterfaceTest.java b/src/test/java/overrun/marshal/test/IndirectInterfaceTest.java
new file mode 100644
index 0000000..621fc1d
--- /dev/null
+++ b/src/test/java/overrun/marshal/test/IndirectInterfaceTest.java
@@ -0,0 +1,47 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2024 Overrun Organization
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ */
+
+package overrun.marshal.test;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import overrun.marshal.Downcall;
+
+import java.lang.foreign.SymbolLookup;
+
+/**
+ * Test indirect interface
+ *
+ * @author squid233
+ * @since 0.1.0
+ */
+public final class IndirectInterfaceTest {
+    interface I1 {
+        default int fun1() {
+            return 1;
+        }
+    }
+
+    interface I2 extends I1 {
+    }
+
+    I2 INSTANCE = Downcall.load(I2.class, SymbolLookup.loaderLookup());
+
+    @Test
+    void testIndirectInterface() {
+        Assertions.assertEquals(1, INSTANCE.fun1());
+    }
+}