diff --git a/core/src/processing/opengl/PJOGL.java b/core/src/processing/opengl/PJOGL.java
index 73512ca55..272991770 100644
--- a/core/src/processing/opengl/PJOGL.java
+++ b/core/src/processing/opengl/PJOGL.java
@@ -54,7 +54,6 @@ import com.jogamp.opengl.glu.GLUtessellator;
 import com.jogamp.opengl.glu.GLUtessellatorCallbackAdapter;
 
 import processing.core.PApplet;
-import processing.core.PConstants;
 import processing.core.PGraphics;
 import processing.opengl.PGL;
 import processing.opengl.PGraphicsOpenGL;
diff --git a/core/todo.txt b/core/todo.txt
index 12b03ac96..416ca0641 100644
--- a/core/todo.txt
+++ b/core/todo.txt
@@ -37,6 +37,8 @@ X   https://github.com/processing/processing/pull/3604
 X   https://github.com/processing/processing/pull/3605
 X   https://github.com/processing/processing/pull/3606
 X   https://github.com/processing/processing/pull/3628
+X Improve OpenGL extensions checks
+X   https://github.com/processing/processing/pull/3646
 
 opengl
 X filter(PShader) broken in HDPI mode