diff --git a/core/src/processing/core/PConstants.java b/core/src/processing/core/PConstants.java
index c7d6e8395..6792ec054 100644
--- a/core/src/processing/core/PConstants.java
+++ b/core/src/processing/core/PConstants.java
@@ -520,5 +520,8 @@ public interface PConstants {
   static final int DISABLE_KEY_REPEAT         =  11;
   static final int ENABLE_KEY_REPEAT          = -11;
 
-  static final int HINT_COUNT                 =  12;
+  static final int DISABLE_ASYNC_SAVEFRAME    =  12;
+  static final int ENABLE_ASYNC_SAVEFRAME     = -12;
+
+  static final int HINT_COUNT                 =  13;
 }
diff --git a/core/src/processing/core/PGraphics.java b/core/src/processing/core/PGraphics.java
index 6ed48dc90..16d617526 100644
--- a/core/src/processing/core/PGraphics.java
+++ b/core/src/processing/core/PGraphics.java
@@ -1126,6 +1126,11 @@ public class PGraphics extends PImage implements PConstants {
    * (including auto-repeated). Call hint(DISABLE_KEY_REPEAT) to get events
    * only when the key goes physically up or down.
    * <br/> <br/>
+   * hint(DISABLE_ASYNC_SAVEFRAME) - P2D/P3D only - save() and saveFrame()
+   * will not use separate threads for saving and will block until the image
+   * is written to the drive. This was the default behavior in 3.0b7 and before.
+   * To enable, call hint(ENABLE_ASYNC_SAVEFRAME).
+   * <br/> <br/>
    * As of release 0149, unhint() has been removed in favor of adding
    * additional ENABLE/DISABLE constants to reset the default behavior. This
    * prevents the double negatives, and also reinforces which hints can be