--- m4/grib2.m4	2008-08-07 11:07:42.000000000 -0400
+++ m4/grib2.m4.new	2012-01-26 22:49:47.799594810 -0500
@@ -5,7 +5,7 @@
   ga_check_grib2="no"
   AC_CHECK_HEADER(grib2.h,
   [ AC_CHECK_LIB(grib2c, main, 
-    [ AC_CHECK_LIB(png12, main,
+    [ AC_CHECK_LIB(png, main,
       [ AC_CHECK_LIB(z, main,
         [ AC_CHECK_LIB(jasper, main,
           [ ga_check_grib2="yes"