diff --git a/ANNOUNCE b/ANNOUNCE
index c3dc6a93..ebb3cbae 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -54,6 +54,9 @@ version 1.2.42beta01 [December 4, 2009]
 
 version 1.2.42beta02 [December 11, 2009]
   Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
+  Relocated png_do_chop() to its original position in pngrtran.c; the
+    change in version 1.2.41beta08 caused transparency to be handled wrong
+    in some 16-bit datastreams (Yusaku Sugai).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 
diff --git a/CHANGES b/CHANGES
index 72ca0541..efc9d0e4 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2617,6 +2617,9 @@ version 1.2.42beta01 [December 4, 2009]
 
 version 1.2.42beta02 [December 11, 2009]
   Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
+  Relocated png_do_chop() to its original position in pngrtran.c; the
+    change in version 1.2.41beta08 caused transparency to be handled wrong
+    in some 16-bit datastreams (Yusaku Sugai).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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diff --git a/pngrtran.c b/pngrtran.c
index 6ba8afed..d32f0c4a 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1437,11 +1437,6 @@ png_do_read_transformations(png_structp png_ptr)
       png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
 #endif
 
-#ifdef PNG_READ_16_TO_8_SUPPORTED
-   if (png_ptr->transformations & PNG_16_TO_8)
-      png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
 #ifdef PNG_READ_BACKGROUND_SUPPORTED
    if ((png_ptr->transformations & PNG_BACKGROUND) &&
       ((png_ptr->num_trans != 0 ) ||
@@ -1471,6 +1466,11 @@ png_do_read_transformations(png_structp png_ptr)
           png_ptr->gamma_shift);
 #endif
 
+#ifdef PNG_READ_16_TO_8_SUPPORTED
+   if (png_ptr->transformations & PNG_16_TO_8)
+      png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
 #ifdef PNG_READ_DITHER_SUPPORTED
    if (png_ptr->transformations & PNG_DITHER)
    {