diff --git a/java/libraries/opengl2/src/processing/opengl2/PGraphicsOpenGL2.java b/java/libraries/opengl2/src/processing/opengl2/PGraphicsOpenGL2.java
index fc5ea90ab..de33af568 100644
--- a/java/libraries/opengl2/src/processing/opengl2/PGraphicsOpenGL2.java
+++ b/java/libraries/opengl2/src/processing/opengl2/PGraphicsOpenGL2.java
@@ -703,7 +703,9 @@ public class PGraphicsOpenGL2 extends PGraphics {
   
   public void dispose() { // PGraphics    
     super.dispose();
-    deleteAllGLResources();    
+    detainContext();
+    deleteAllGLResources();
+    releaseContext();
     GLProfile.shutdown();
   }