diff --git a/ANNOUNCE b/ANNOUNCE
index 53e0108fd..07b3f48d3 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -520,6 +520,8 @@ Version 1.7.0beta31 [February 5, 2014]
     the read code to return an invalid sBIT chunk, which might lead to
     application errors or crashes.  Such chunks are now skipped (with
     chunk_benign_error).
+  Restored a line, "c = b;", that was inadvertently deleted from the
+    PAETH filtering code from libpng-1.7.0beta24/pngrutil.c. 
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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diff --git a/CHANGES b/CHANGES
index a88a93b90..2c16f9ce5 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4809,6 +4809,8 @@ Version 1.7.0beta31 [February 5, 2014]
     the read code to return an invalid sBIT chunk, which might lead to
     application errors or crashes.  Such chunks are now skipped (with
     chunk_benign_error).
+  Restored a line, "c = b;", that was inadvertently deleted from the
+    PAETH filtering code from libpng-1.7.0beta24/pngrutil.c. 
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/pngrutil.c b/pngrutil.c
index 60ed29e0c..3140ec050 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -3807,6 +3807,7 @@ png_read_filter_row_paeth_1byte_pixel(png_row_infop row_info, png_bytep row,
       /* Calculate the current pixel in a, and move the previous row pixel to c
        * for the next time round the loop
        */
+      c = b;
       a += *row;
       *row++ = (png_byte)a;
    }
diff --git a/tests/pngimage-full b/tests/pngimage-full
index 49cf7700e..f5eb9895e 100755
--- a/tests/pngimage-full
+++ b/tests/pngimage-full
@@ -1,4 +1,2 @@
 #!/bin/sh
-# does not work
-# exec ./pngimage --exhaustive --log "${srcdir}/contrib/pngsuite/"*.png
-exit 77
+exec ./pngimage --exhaustive --log "${srcdir}/contrib/pngsuite/"*.png
diff --git a/tests/pngimage-quick b/tests/pngimage-quick
index 94eb3f7f7..2d4b5db22 100755
--- a/tests/pngimage-quick
+++ b/tests/pngimage-quick
@@ -1,4 +1,2 @@
 #!/bin/sh
-# does not work
-# exec ./pngimage --log "${srcdir}/contrib/pngsuite/"*.png
-exit 77
+exec ./pngimage --log "${srcdir}/contrib/pngsuite/"*.png