diff --git a/src/com/esotericsoftware/reflectasm/AccessClassLoader.java b/src/com/esotericsoftware/reflectasm/AccessClassLoader.java
index 59c4a8f..9ef0423 100644
--- a/src/com/esotericsoftware/reflectasm/AccessClassLoader.java
+++ b/src/com/esotericsoftware/reflectasm/AccessClassLoader.java
@@ -17,6 +17,7 @@
 import java.lang.ref.WeakReference;
 import java.lang.reflect.Method;
 import java.security.ProtectionDomain;
+import java.util.HashSet;
 import java.util.WeakHashMap;
 
 class AccessClassLoader extends ClassLoader {
@@ -82,6 +83,19 @@ private AccessClassLoader (ClassLoader parent) {
 		super(parent);
 	}
 
+        HashSet<String> locals = new HashSet<String>();
+	java.lang.Class<?> loadClassLocal(String name) throws ClassNotFoundException {
+            if (locals.contains(name))
+                return loadClass(name,false);
+            else
+                throw new ClassNotFoundException();
+        }
+	Class<?> defineClassLocal(String name, byte[] bytes) throws ClassFormatError {
+            locals.add(name);
+            return defineClass(name,bytes);
+        }
+        
+        
 	protected java.lang.Class<?> loadClass (String name, boolean resolve) throws ClassNotFoundException {
 		// These classes come from the classloader that loaded AccessClassLoader.
 		if (name.equals(FieldAccess.class.getName())) return FieldAccess.class;
diff --git a/src/com/esotericsoftware/reflectasm/ConstructorAccess.java b/src/com/esotericsoftware/reflectasm/ConstructorAccess.java
index 6364462..4bdc3c5 100644
--- a/src/com/esotericsoftware/reflectasm/ConstructorAccess.java
+++ b/src/com/esotericsoftware/reflectasm/ConstructorAccess.java
@@ -52,11 +52,11 @@ static public <T> ConstructorAccess<T> get (Class<T> type) {
 
 		AccessClassLoader loader = AccessClassLoader.get(type);
 		try {
-			accessClass = loader.loadClass(accessClassName);
+			accessClass = loader.loadClassLocal(accessClassName);
 		} catch (ClassNotFoundException ignored) {
 			synchronized (loader) {
 				try {
-					accessClass = loader.loadClass(accessClassName);
+					accessClass = loader.loadClassLocal(accessClassName);
 				} catch (ClassNotFoundException ignored2) {
 					String accessClassNameInternal = accessClassName.replace('.', '/');
 					String classNameInternal = className.replace('.', '/');
@@ -100,7 +100,7 @@ static public <T> ConstructorAccess<T> get (Class<T> type) {
 					insertNewInstanceInner(cw, classNameInternal, enclosingClassNameInternal);
 
 					cw.visitEnd();
-					accessClass = loader.defineClass(accessClassName, cw.toByteArray());
+					accessClass = loader.defineClassLocal(accessClassName, cw.toByteArray());
 				}
 			}
 		}
diff --git a/src/com/esotericsoftware/reflectasm/FieldAccess.java b/src/com/esotericsoftware/reflectasm/FieldAccess.java
index 50f97e6..0226609 100644
--- a/src/com/esotericsoftware/reflectasm/FieldAccess.java
+++ b/src/com/esotericsoftware/reflectasm/FieldAccess.java
@@ -122,11 +122,11 @@ static public FieldAccess get (Class type) {
 
 		AccessClassLoader loader = AccessClassLoader.get(type);
 		try {
-			accessClass = loader.loadClass(accessClassName);
+			accessClass = loader.loadClassLocal(accessClassName);
 		} catch (ClassNotFoundException ignored) {
 			synchronized (loader) {
 				try {
-					accessClass = loader.loadClass(accessClassName);
+					accessClass = loader.loadClassLocal(accessClassName);
 				} catch (ClassNotFoundException ignored2) {
 					String accessClassNameInternal = accessClassName.replace('.', '/');
 					String classNameInternal = className.replace('.', '/');
@@ -155,7 +155,7 @@ static public FieldAccess get (Class type) {
 					insertSetPrimitive(cw, classNameInternal, fields, Type.CHAR_TYPE);
 					insertGetString(cw, classNameInternal, fields);
 					cw.visitEnd();
-					accessClass = loader.defineClass(accessClassName, cw.toByteArray());
+					accessClass = loader.defineClassLocal(accessClassName, cw.toByteArray());
 				}
 			}
 		}
diff --git a/src/com/esotericsoftware/reflectasm/MethodAccess.java b/src/com/esotericsoftware/reflectasm/MethodAccess.java
index fb40c20..51f67c4 100644
--- a/src/com/esotericsoftware/reflectasm/MethodAccess.java
+++ b/src/com/esotericsoftware/reflectasm/MethodAccess.java
@@ -108,11 +108,11 @@ static public MethodAccess get (Class type) {
 
 		AccessClassLoader loader = AccessClassLoader.get(type);
 		try {
-			accessClass = loader.loadClass(accessClassName);
+			accessClass = loader.loadClassLocal(accessClassName);
 		} catch (ClassNotFoundException ignored) {
 			synchronized (loader) {
 				try {
-					accessClass = loader.loadClass(accessClassName);
+					accessClass = loader.loadClassLocal(accessClassName);
 				} catch (ClassNotFoundException ignored2) {
 					String accessClassNameInternal = accessClassName.replace('.', '/');
 					String classNameInternal = className.replace('.', '/');
@@ -272,7 +272,7 @@ else if (Modifier.isStatic(methods.get(i).getModifiers()))
 					}
 					cw.visitEnd();
 					byte[] data = cw.toByteArray();
-					accessClass = loader.defineClass(accessClassName, data);
+					accessClass = loader.defineClassLocal(accessClassName, data);
 				}
 			}
 		}