--- ./configure.in.old	2002-12-18 10:19:13.000000000 -0800
+++ ./configure.in	2002-12-18 10:24:06.000000000 -0800
@@ -204,9 +204,9 @@
 dnl
 PNG_LIBS=
 AC_CHECK_LIB(png, png_init_io, [
-	     PNG_LIBS="-lpng -lz"],[
+	     PNG_LIBS="-lpng -lz -lm"],[
 	     AC_MSG_ERROR(libpng is required for gnome-core)],
-	     -lz)
+	     -lz -lm)
 AC_SUBST(PNG_LIBS)
 
 dnl