diff --git a/ANNOUNCE b/ANNOUNCE
index 0f26e1730..6c14e83ed 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -34,6 +34,8 @@ version 1.4.8beta01 [June 4, 2011]
     was introduced in libpng-1.2.20beta01.
   Check for up->location !PNG_AFTER_IDAT when writing unknown chunks
     before IDAT.
+  Port change to pngrtran.c from 1.5.3: when expanding a paletted image,
+    always expand to RGBA if transparency is present.
 
 Send comments/corrections/commendations to glennrp at users.sourceforge.net
 or to png-mng-implement at lists.sf.net (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 5081935a0..e31ab4b8b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2802,6 +2802,8 @@ version 1.4.8beta01 [June 4, 2011]
     was introduced in libpng-1.2.20beta01.
   Check for up->location !PNG_AFTER_IDAT when writing unknown chunks
     before IDAT.
+  Port change to pngrtran.c from 1.5.3: when expanding a paletted image,
+    always expand to RGBA if transparency is present.
 
 Send comments/corrections/commendations to glennrp at users.sourceforge.net
 or to png-mng-implement at lists.sf.net (subscription required; visit
diff --git a/pngrtran.c b/pngrtran.c
index df4920ca5..4cd4d8713 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1181,8 +1181,7 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
    {
       if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
       {
-         if (png_ptr->num_trans &&
-              (png_ptr->transformations & PNG_EXPAND_tRNS))
+         if (png_ptr->num_trans)
             info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
          else
             info_ptr->color_type = PNG_COLOR_TYPE_RGB;