diff --git a/ChangeLog b/ChangeLog
index 75f84434..0895703f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-03-29  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>
+
+	* configure.ac: Applied patch by Brad Smith to improve pkg-config
+	static linking by adding -lm to Libs.private when needed.
+
 2013-03-05  Tom Lane  <tgl@sss.pgh.pa.us>
 
 	* html/man/tiff2ps.1.html, html/man/tiffcp.1.html,
diff --git a/configure b/configure
index 8f27f01a..c3c7f1ab 100755
--- a/configure
+++ b/configure
@@ -16088,6 +16088,9 @@ fi
 AM_BACKSLASH='\'
 
 
+tiff_libs_private=
+
+
 case "${host_os}" in
     cygwin* | mingw32* | beos* | darwin*)
         ;;
@@ -16129,20 +16132,18 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_sin" >&5
 $as_echo "$ac_cv_lib_m_sin" >&6; }
 if test "x$ac_cv_lib_m_sin" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_LIBM 1
-_ACEOF
-
-  LIBS="-lm $LIBS"
-
+  libm_lib=yes
+else
+  libm_lib=no
 fi
 
+	if test "x$libm_lib" = "xyes" ; then
+	  LIBS="-lm $LIBS"
+	  tiff_libs_private="-lm ${tiff_libs_private}"
+	fi
         ;;
 esac
 
-tiff_libs_private=
-
-
 for ac_header in assert.h fcntl.h io.h limits.h malloc.h search.h sys/time.h unistd.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
diff --git a/configure.ac b/configure.ac
index e1b8d407..d4be12ac 100644
--- a/configure.ac
+++ b/configure.ac
@@ -154,18 +154,22 @@ LT_LANG([C++])
 # Enable support for silent build rules
 AM_SILENT_RULES
 
+tiff_libs_private=
+AC_SUBST(tiff_libs_private)
+
 dnl We don't need to add math library to all targets
 case "${host_os}" in
     cygwin* | mingw32* | beos* | darwin*)
         ;;
     *)
-	AC_CHECK_LIB(m,sin,,,)
+	AC_CHECK_LIB(m,sin,[libm_lib=yes], [libm_lib=no],)
+	if test "x$libm_lib" = "xyes" ; then
+	  LIBS="-lm $LIBS"
+	  tiff_libs_private="-lm ${tiff_libs_private}"
+	fi
         ;;
 esac
 
-tiff_libs_private=
-AC_SUBST(tiff_libs_private)
-
 dnl Checks for header files.
 AC_CHECK_HEADERS([assert.h fcntl.h io.h limits.h malloc.h search.h sys/time.h unistd.h])
 
diff --git a/libtiff/tif_config.h.in b/libtiff/tif_config.h.in
index b2cea354..72e3d3cb 100644
--- a/libtiff/tif_config.h.in
+++ b/libtiff/tif_config.h.in
@@ -79,9 +79,6 @@
 /* Define to 1 if you have the `lfind' function. */
 #undef HAVE_LFIND
 
-/* Define to 1 if you have the `m' library (-lm). */
-#undef HAVE_LIBM
-
 /* Define to 1 if you have the <limits.h> header file. */
 #undef HAVE_LIMITS_H