diff --git a/configure.ac b/configure.ac
index dede482..376f6c7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -130,8 +130,7 @@ AC_ARG_WITH([hdf5],
   AS_HELP_STRING([--with-hdf5=PATH], [Path to HDF5 library and headers]), [
   with_hdf5="$withval"], [with_hdf5="yes"])
 
-AS_IF([test "x$with_hdf5" == "xno"], [
-           AC_DEFINE([HAVE_HDF5], 0, [Define to 1 if HDF5 is available]) ],
+AS_IF([test "x$with_hdf5" == "xno"], [], 
       [test "x$with_hdf5" != "xyes"], [
            HDF5_LIBS="-lhdf5"
            HDF5_PATH="$with_hdf5"