diff --git a/ANNOUNCE b/ANNOUNCE
index 424eb1612..0d3cbac56 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -89,6 +89,7 @@ version 1.5.0beta13 [March 9, 2010]
   Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
     PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
     is defined.
+  Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3
 
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diff --git a/CHANGES b/CHANGES
index e00230324..f1cca6550 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2566,6 +2566,7 @@ version 1.5.0beta13 [March 9, 2010]
   Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
     PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
     is defined.
+  Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3
 
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diff --git a/libpngpf.3 b/libpngpf.3
index 5058f0ae2..b601504eb 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -3,8 +3,6 @@
 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta13
 (private functions)
 .SH SYNOPSIS
-\fB#include <png.h>\fP
-
 \fB#include \fI"pngpriv.h"
 
 \fI\fB
diff --git a/pngpriv.h b/pngpriv.h
index d8a1578f1..8efeff208 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -309,8 +309,6 @@ PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf,
 /* Decompress data in a chunk that uses compression */
 #if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \
     defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
-PNG_EXTERN png_size_t png_measure_decompressed_chunk PNGARG((png_structp
-    png_ptr, int comp_type, png_size_t chunklength, png_size_t prefix_length));
 PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr,
     int comp_type, png_size_t chunklength, png_size_t prefix_length,
     png_size_t *data_length));