diff --git a/core/src/processing/opengl/PGL.java b/core/src/processing/opengl/PGL.java
index 3ccc10072..4a01d1999 100644
--- a/core/src/processing/opengl/PGL.java
+++ b/core/src/processing/opengl/PGL.java
@@ -1203,7 +1203,7 @@ public class PGL {
   }
 
 
-  protected static boolean glThreadIsCurrent() {
+  protected boolean threadIsCurrent() {
     return Thread.currentThread() == glThread;
   }
 
diff --git a/core/src/processing/opengl/PGraphicsOpenGL.java b/core/src/processing/opengl/PGraphicsOpenGL.java
index fb0ee355d..29335067d 100644
--- a/core/src/processing/opengl/PGraphicsOpenGL.java
+++ b/core/src/processing/opengl/PGraphicsOpenGL.java
@@ -5741,7 +5741,7 @@ public class PGraphicsOpenGL extends PGraphics {
 
 
   protected boolean checkGLThread() {
-    if (PGL.glThreadIsCurrent()) {
+    if (pgl.threadIsCurrent()) {
       return true;
     } else {
       PGraphics.showWarning(OPENGL_THREAD_ERROR);