diff --git a/src/main/java/net/minecraftforge/fml/common/ModClassLoader.java b/src/main/java/net/minecraftforge/fml/common/ModClassLoader.java
index ea234836d1..8565a64714 100644
--- a/src/main/java/net/minecraftforge/fml/common/ModClassLoader.java
+++ b/src/main/java/net/minecraftforge/fml/common/ModClassLoader.java
@@ -103,6 +103,8 @@ public class ModClassLoader extends URLClassLoader
 
     public boolean isDefaultLibrary(File file)
     {
+        String home = System.getProperty("java.home"); // Nullcheck just in case some JVM decides to be stupid
+        if (home != null && file.getAbsolutePath().startsWith(home)) return true;
         // Should really pull this from the json somehow, but we dont have that at runtime.
         String name = file.getName();
         if (!name.endsWith(".jar")) return false;