diff --git a/src/utils/SkPolyUtils.cpp b/src/utils/SkPolyUtils.cpp
index 52435798e2..6ddf0d7c46 100644
--- a/src/utils/SkPolyUtils.cpp
+++ b/src/utils/SkPolyUtils.cpp
@@ -1164,7 +1164,9 @@ bool SkOffsetSimplePolygon(const SkPoint* inputPolygonVerts, int inputPolygonSiz
     if (SkScalarNearlyZero(offset)) {
         for (int i = 0; i < inputPolygonSize; ++i) {
             *offsetPolygon->push() = inputPolygonVerts[i];
-            *polygonIndices->push() = i;
+            if (polygonIndices) {
+                *polygonIndices->push() = i;
+            }
         }
         return true;
     }