diff --git a/MagickWand/convert.c b/MagickWand/convert.c
index 983238b..a3d6c73 100644
--- a/MagickWand/convert.c
+++ b/MagickWand/convert.c
@@ -927,6 +927,7 @@
clone_images=image;
if (k != 0)
clone_images=image_stack[k-1].image;
+ /* FUTURE: Change error report to something more meaningful */
if (clone_images == (Image *) NULL)
ThrowConvertException(ImageError,"ImageSequenceRequired",option);
FireImageStack(MagickTrue,MagickTrue,MagickTrue);
diff --git a/MagickWand/mogrify.c b/MagickWand/mogrify.c
index a9cb15c..b3441ec 100644
--- a/MagickWand/mogrify.c
+++ b/MagickWand/mogrify.c
@@ -348,8 +348,8 @@
*read_info;
/*
- Read an image into a image cache if not already present. Return the image
- that is in the cache under that filename.
+ Read an image into a image cache (for repeated usage) if not already in
+ cache. Then return the image that is in the cache.
*/
(void) FormatLocaleString(key,MaxTextExtent,"cache:%s",path);
sans_exception=AcquireExceptionInfo();