diff --git a/library/src/main/api14/com/google/android/cameraview/Camera1.java b/library/src/main/api14/com/google/android/cameraview/Camera1.java
index 0f92ac50..d59cc0dd 100644
--- a/library/src/main/api14/com/google/android/cameraview/Camera1.java
+++ b/library/src/main/api14/com/google/android/cameraview/Camera1.java
@@ -151,9 +151,11 @@ int getFacing() {
     @Override
     Set<AspectRatio> getSupportedAspectRatios() {
         SizeMap idealAspectRatios = mPreviewSizes;
-        for (AspectRatio aspectRatio : idealAspectRatios.ratios()) {
+        Iterator<AspectRatio> iterator = idealAspectRatios.ratios().iterator();
+        while (iterator.hasNext()) {
+            AspectRatio aspectRatio = iterator.next();
             if (mPictureSizes.sizes(aspectRatio) == null) {
-                idealAspectRatios.remove(aspectRatio);
+                iterator.remove();
             }
         }
         return idealAspectRatios.ratios();