diff -pur Shaaft-0.5.0.orig/configure.in Shaaft-0.5.0/configure.in
--- Shaaft-0.5.0.orig/configure.in	2004-01-01 18:19:58.000000000 -0500
+++ Shaaft-0.5.0/configure.in	2010-03-10 14:50:11.244218850 -0500
@@ -83,7 +83,7 @@ else
     LIBS="-L/usr/local/lib -L/usr/X11R6/lib $LIBS"
     CFLAGS="$CFLAGS -I/usr/X11R6/include" ; \
     CXXFLAGS="$CXXFLAGS -I/usr/X11R6/include"
-    AC_CHECK_LIB(png12, main,, AC_MSG_ERROR(libpng12 is needed))
+    AC_CHECK_LIB(png, main,, AC_MSG_ERROR(libpng is needed))
     AC_CHECK_LIB(z, main,, AC_MSG_ERROR(libz is needed))
     if test "x$enable_dyngl" = xoff; then
         AC_CHECK_LIB(GL, glBegin,, AC_MSG_ERROR(OpenGL is needed))