diff --git a/core/src/processing/core/PMatrix.java b/core/src/processing/core/PMatrix.java
index 53f7fa54b..2670eb5ce 100644
--- a/core/src/processing/core/PMatrix.java
+++ b/core/src/processing/core/PMatrix.java
@@ -97,6 +97,8 @@ public interface PMatrix {
   /**
    * Apply another matrix to the left of this one.
    */
+  public void preApply(PMatrix left);
+
   public void preApply(PMatrix2D left);
 
   public void preApply(PMatrix3D left);
diff --git a/core/src/processing/core/PMatrix2D.java b/core/src/processing/core/PMatrix2D.java
index d5616b58d..1ee6b0a88 100644
--- a/core/src/processing/core/PMatrix2D.java
+++ b/core/src/processing/core/PMatrix2D.java
@@ -247,6 +247,15 @@ public class PMatrix2D implements PMatrix {
   /**
    * Apply another matrix to the left of this one.
    */
+  public void preApply(PMatrix source) {
+    if (source instanceof PMatrix2D) {
+      preApply((PMatrix2D) source);
+    } else if (source instanceof PMatrix3D) {
+      preApply((PMatrix3D) source);
+    }
+  }
+
+
   public void preApply(PMatrix2D left) {
     preApply(left.m00, left.m01, left.m02,
              left.m10, left.m11, left.m12);
diff --git a/core/src/processing/core/PMatrix3D.java b/core/src/processing/core/PMatrix3D.java
index deeb23b45..f75cb1227 100644
--- a/core/src/processing/core/PMatrix3D.java
+++ b/core/src/processing/core/PMatrix3D.java
@@ -369,6 +369,15 @@ public final class PMatrix3D implements PMatrix /*, PConstants*/ {
   /**
    * Apply another matrix to the left of this one.
    */
+  public void preApply(PMatrix source) {
+    if (source instanceof PMatrix2D) {
+      preApply((PMatrix2D) source);
+    } else if (source instanceof PMatrix3D) {
+      preApply((PMatrix3D) source);
+    }
+  }
+
+
   public void preApply(PMatrix3D left) {
     preApply(left.m00, left.m01, left.m02, left.m03,
              left.m10, left.m11, left.m12, left.m13,