diff --git a/android/core/src/processing/core/PShapeOBJ.java b/android/core/src/processing/core/PShapeOBJ.java
index 148725c4f..1f4bd50bb 100644
--- a/android/core/src/processing/core/PShapeOBJ.java
+++ b/android/core/src/processing/core/PShapeOBJ.java
@@ -217,6 +217,7 @@ public class PShapeOBJ extends PShape {
               if (mreader != null) {
                 parseMTL(parent, mreader, materials, mtlTable);
               }
+              mreader.close();
             }
           } else if (parts[0].equals("g")) {
             gname = 1 < parts.length ? parts[1] : "";