diff --git a/ANNOUNCE b/ANNOUNCE
index 799a8f062..c12d5ae5c 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -53,6 +53,7 @@ Version 1.6.33rc01 [September 20, 2017]
   Initialize memory allocated by png_read_buffer to zero, using memset, to
     stop an oss-fuzz "use of uninitialized value" detection in
     png_icc_check_tag_table()() due to truncated iCCP chunk.
+  Removed a redundant test (suggested by "irwir" in Github issue #180).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index eaa508a2f..405d1a3e2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -6023,6 +6023,7 @@ Version 1.6.33rc01 [September 20, 2017]
   Initialize memory allocated by png_read_buffer to zero, using memset, to
     stop an oss-fuzz "use of uninitialized value" detection in
     png_icc_check_tag_table()() due to truncated iCCP chunk.
+  Removed a redundant test (suggested by "irwir" in Github issue #180).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/pngrutil.c b/pngrutil.c
index 61b22cd1e..eb6dc6abc 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -738,9 +738,7 @@ png_decompress_chunk(png_structrp png_ptr,
             {
                /* inflateReset failed, store the error message */
                png_zstream_error(png_ptr, ret);
-
-               if (ret == Z_STREAM_END)
-                  ret = PNG_UNEXPECTED_ZLIB_RETURN;
+               ret = PNG_UNEXPECTED_ZLIB_RETURN;
             }
          }