diff --git a/src/core/org/luaj/lib/CoroutineLib.java b/src/core/org/luaj/lib/CoroutineLib.java
index 20e49e23..351f742a 100644
--- a/src/core/org/luaj/lib/CoroutineLib.java
+++ b/src/core/org/luaj/lib/CoroutineLib.java
@@ -54,6 +54,7 @@ public class CoroutineLib extends LFunction {
 		for ( int i=1; i<=YIELD; i++ )
 			lib.put(NAMES[i], new CoroutineLib(i));
 		globals.put("coroutine",lib);
+		PackageLib.setIsLoaded("coroutine", lib);
 	}
 	
 	private final int id;
diff --git a/src/core/org/luaj/lib/MathLib.java b/src/core/org/luaj/lib/MathLib.java
index eb0cda79..235cb93d 100644
--- a/src/core/org/luaj/lib/MathLib.java
+++ b/src/core/org/luaj/lib/MathLib.java
@@ -120,7 +120,9 @@ public class MathLib extends LFunction {
 		math.put( "huge", new LDouble( Double.MAX_VALUE ) );
 		math.put( "pi", new LDouble( Math.PI ) );		
 		globals.put( "math", math );
+		PackageLib.setIsLoaded("math", math);
 		platform = Platform.getInstance();
+		
 	}
 
 	private static Random random = null;
diff --git a/src/core/org/luaj/lib/PackageLib.java b/src/core/org/luaj/lib/PackageLib.java
index 0844e183..f85b30ca 100644
--- a/src/core/org/luaj/lib/PackageLib.java
+++ b/src/core/org/luaj/lib/PackageLib.java
@@ -95,6 +95,12 @@ public class PackageLib extends LFunction {
 		pckg.put( "loaders", loaders );
 		pckg.put( _PATH, _LUA_PATH );
 		globals.put( "package", pckg );
+		setIsLoaded( "package", pckg );
+	}
+
+	/** Allow packages to mark themselves as loaded */
+	public static void setIsLoaded(String name, LTable value) {
+		LOADED.put(name, value);
 	}
 
 	public static void setLuaPath( String newLuaPath ) {
@@ -180,7 +186,7 @@ public class PackageLib extends LFunction {
 		int n = vm.gettop();
 		LValue value = LOADED.get(modname);
 		LTable module;
-		if ( value.luaGetType() != Lua.LUA_TTABLE ) { /* not found? */
+		if ( ! value.isTable() ) { /* not found? */
 			
 		    /* try global variable (and create one if it does not exist) */
 			module = findtable( vm._G, modname );
@@ -322,7 +328,11 @@ public class PackageLib extends LFunction {
 	}
 
 	public static void loadlib( LuaState vm ) {
-		vm.error( "loadlib not implemented" );
+		vm.checkstring(2);
+		vm.resettop();
+		vm.pushnil();
+		vm.pushstring("dynamic libraries not enabled");
+		vm.pushstring("absent");
 	}
 
 
diff --git a/src/core/org/luaj/lib/StringLib.java b/src/core/org/luaj/lib/StringLib.java
index 3242514b..fabc2dcd 100644
--- a/src/core/org/luaj/lib/StringLib.java
+++ b/src/core/org/luaj/lib/StringLib.java
@@ -71,6 +71,7 @@ public class StringLib extends LFunction {
 		for ( int i=1; i<NAMES.length; i++ )
 			string.put(NAMES[i], new StringLib(i));
 		globals.put( "string", string );
+		PackageLib.setIsLoaded("string", string);
 	}
 
 	private final int id;
diff --git a/src/core/org/luaj/lib/TableLib.java b/src/core/org/luaj/lib/TableLib.java
index f439274e..9597a969 100644
--- a/src/core/org/luaj/lib/TableLib.java
+++ b/src/core/org/luaj/lib/TableLib.java
@@ -60,6 +60,7 @@ public class TableLib extends LFunction {
 		for ( int i=1; i<NAMES.length; i++ )
 			table.put( NAMES[i], new TableLib(i) );
 		globals.put( "table", table );
+		PackageLib.setIsLoaded("table", table);
 	}
 
 	private final int id;
diff --git a/src/core/org/luaj/vm/LuaState.java b/src/core/org/luaj/vm/LuaState.java
index 6c9b5e94..8748a8df 100644
--- a/src/core/org/luaj/vm/LuaState.java
+++ b/src/core/org/luaj/vm/LuaState.java
@@ -141,10 +141,10 @@ public class LuaState extends Lua {
 	 * BaseLib, CoroutineLib, MathLib, PackageLib, TableLib, StringLib
 	 */
 	public void installStandardLibs() {
+        PackageLib.install(_G);
 		BaseLib.install(_G);
         CoroutineLib.install(_G);
         MathLib.install(_G);
-        PackageLib.install(_G);
         TableLib.install(_G);
         StringLib.install(_G);	
 	}