diff --git a/ANNOUNCE b/ANNOUNCE
index b1edea33b..70ce1e4e0 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -704,6 +704,7 @@ Version 1.7.0beta48 [February 7, 2015]
 Version 1.7.0beta49 [February 10, 2015]
   Combined sub_row, up_row, avg_row, and paeth_row buffers into a
     single try_row buffer.
+  Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 3b22bdb89..b46bea1c0 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4993,6 +4993,7 @@ Version 1.7.0beta48 [February 7, 2015]
 Version 1.7.0beta49 [February 10, 2015]
   Combined sub_row, up_row, avg_row, and paeth_row buffers into a
     single try_row buffer.
+  Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/png.h b/png.h
index 875f34db6..26d6447d2 100644
--- a/png.h
+++ b/png.h
@@ -1748,6 +1748,7 @@ PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
  * for PNG images, and do considerably fewer caclulations.  In the future,
  * these values may not correspond directly to the zlib compression levels.
  */
+#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
 PNG_EXPORT(69, void, png_set_compression_level, (png_structrp png_ptr,
     int level));
 
@@ -1765,6 +1766,7 @@ PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structrp png_ptr,
 
 PNG_EXPORT(73, void, png_set_compression_method, (png_structrp png_ptr,
     int method));
+#endif /* WRITE_CUSTOMIZE_COMPRESSION */
 
 #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
 /* Also set zlib parameters for compressing non-IDAT chunks */
diff --git a/pngwrite.c b/pngwrite.c
index 248e638fe..9ede3cdea 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1348,6 +1348,7 @@ png_set_filter_heuristics_fixed(png_structrp png_ptr, int heuristic_method,
 #endif /* FIXED_POINT */
 #endif /* WRITE_WEIGHTED_FILTER */
 
+#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
 void PNGAPI
 png_set_compression_level(png_structrp png_ptr, int level)
 {
@@ -1430,6 +1431,7 @@ png_set_compression_method(png_structrp png_ptr, int method)
 
    png_ptr->zlib_method = method;
 }
+#endif /* WRITE_CUSTOMIZE_COMPRESSION */
 
 /* The following were added to libpng-1.5.4 */
 #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
diff --git a/scripts/pnglibconf.dfa b/scripts/pnglibconf.dfa
index f874fc9a8..027a8b561 100644
--- a/scripts/pnglibconf.dfa
+++ b/scripts/pnglibconf.dfa
@@ -542,6 +542,7 @@ option USER_TRANSFORM_INFO if READ_USER_TRANSFORM, WRITE_USER_TRANSFORM
 # non-IDAT chunks (zTXt, iTXt, iCCP, and unknown chunks).  This feature
 # was added at libpng-1.5.3.
 option WRITE_CUSTOMIZE_ZTXT_COMPRESSION requires WRITE
+option WRITE_CUSTOMIZE_COMPRESSION requires WRITE
 
 # Any chunks you are not interested in, you can undef here.  The
 # ones that allocate memory may be expecially important (hIST,
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index 5f49f74f6..e016b1f77 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -2,7 +2,7 @@
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng version 1.7.0beta49 - February 7, 2015 */
+/* Libpng version 1.7.0beta49 - February 10, 2015 */
 
 /* Copyright (c) 1998-2014 Glenn Randers-Pehrson */
 
@@ -126,6 +126,7 @@
 #define PNG_WRITE_BGR_SUPPORTED
 #define PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED
 #define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED
+#define PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
 #define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
 #define PNG_WRITE_FILLER_SUPPORTED
 #define PNG_WRITE_FILTER_SUPPORTED