diff --git a/ANNOUNCE b/ANNOUNCE
index 0ca7e8d0c..9d99aebdf 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.1beta02 - January 9, 2011
+Libpng 1.5.1beta02 - January 14, 2011
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -35,7 +35,8 @@ version 1.5.1beta01 [January 8, 2011]
   Ensure that png_rgb_to_gray ignores palette mapped images,
   Fixed the failure to handle palette mapped images correctly.
 
-Version 1.5.1beta02 [January 9, 2011]
+Version 1.5.1beta02 [January 14, 2011]
+  Fixed a bug in handling of interlaced images (bero at arklinux.org).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 0b0a2cffd..29d679273 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3151,7 +3151,8 @@ version 1.5.1beta01 [January 8, 2011]
   Ensure that png_rgb_to_gray ignores palette mapped images,
   Fixed the failure to handle palette mapped images correctly.
 
-Version 1.5.1beta02 [January 9, 2011]
+Version 1.5.1beta02 [January 14, 2011]
+  Fixed a bug in handling of interlaced images (bero at arklinux.org).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/pngread.c b/pngread.c
index e092ccefd..056bcbdac 100644
--- a/pngread.c
+++ b/pngread.c
@@ -841,7 +841,7 @@ png_read_image(png_structp png_ptr, png_bytepp image)
    }
    else
    {
-      if (!(png_ptr->transformations & PNG_INTERLACE))
+      if (png_ptr->interlaced && !(png_ptr->transformations & PNG_INTERLACE))
       {
          /* Caller called png_start_read_image or png_read_update_info without
           * first turning on the PNG_INTERLACE transform.  We can fix this here,