diff --git a/ANNOUNCE b/ANNOUNCE
index ba2ff6f5..fb36db78 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -110,6 +110,8 @@ version 1.2.45beta01 [June 7, 2011]
     was introduced in libpng-1.2.20beta01.
   Check for up->location !PNG_AFTER_IDAT when writing unknown chunks
     before IDAT.
+  Ported bugfix in pngrtran.c from 1.5.3: when expanding a paletted image,
+    always expand to RGBA if transparency is present.
 
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
diff --git a/CHANGES b/CHANGES
index 545fe26f..00ec950b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2711,6 +2711,8 @@ version 1.2.45beta01 [June 7, 2011]
     was introduced in libpng-1.2.20beta01.
   Check for up->location !PNG_AFTER_IDAT when writing unknown chunks
     before IDAT.
+  Ported bugfix in pngrtran.c from 1.5.3: when expanding a paletted image,
+    always expand to RGBA if transparency is present.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/pngrtran.c b/pngrtran.c
index af1aa8e4..ca05fe95 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1196,8 +1196,7 @@ 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;