diff --git a/java-api/src/java9/java/xyz/wagyourtail/jvmdg/j9/stub/java_base/J_L_R_InaccessibleObjectException.java b/java-api/src/java9/java/xyz/wagyourtail/jvmdg/j9/stub/java_base/J_L_R_InaccessibleObjectException.java
new file mode 100644
index 0000000..84310fc
--- /dev/null
+++ b/java-api/src/java9/java/xyz/wagyourtail/jvmdg/j9/stub/java_base/J_L_R_InaccessibleObjectException.java
@@ -0,0 +1,12 @@
+package xyz.wagyourtail.jvmdg.j9.stub.java_base;
+
+import xyz.wagyourtail.jvmdg.version.Adapter;
+
+@Adapter("java/lang/reflect/InaccessibleObjectException")
+public class J_L_R_InaccessibleObjectException extends RuntimeException {
+    public J_L_R_InaccessibleObjectException() {}
+
+    public J_L_R_InaccessibleObjectException(String msg) {
+        super(msg);
+    }
+}
diff --git a/java-api/src/main/java/xyz/wagyourtail/jvmdg/providers/Java9Downgrader.java b/java-api/src/main/java/xyz/wagyourtail/jvmdg/providers/Java9Downgrader.java
index 7f6d9ee..a61f90e 100644
--- a/java-api/src/main/java/xyz/wagyourtail/jvmdg/providers/Java9Downgrader.java
+++ b/java-api/src/main/java/xyz/wagyourtail/jvmdg/providers/Java9Downgrader.java
@@ -72,7 +72,7 @@ public void init() {
         // AnnotatedType
         // AnnotatedTypeVariable
         // AnnotatedWildcardType
-        // InaccessibleObjectException
+        stub(J_L_R_InaccessibleObjectException.class);
         stub(J_M_BigDecimal.class);
         stub(J_M_BigInteger.class);
         // MutableBigInteger