diff --git a/core/src/processing/core/PShape.java b/core/src/processing/core/PShape.java
index 483df966f..ab3288c60 100644
--- a/core/src/processing/core/PShape.java
+++ b/core/src/processing/core/PShape.java
@@ -1756,7 +1756,7 @@ public class PShape implements PConstants {
     } else {
       for (int i = 0; i < vertexCount; i++) {
         float[] vert = vertices[i];
-        if (vert[Z] == 0) {
+        if (vert.length < 3 || vert[Z] == 0) {
           g.vertex(vert[X], vert[Y]);
         } else {
           g.vertex(vert[X], vert[Y], vert[Z]);