diff --git a/bigfloat/bigfloat_config.py b/bigfloat/bigfloat_config.py
index <HASH>..<HASH> 100644
--- a/bigfloat/bigfloat_config.py
+++ b/bigfloat/bigfloat_config.py
@@ -6,7 +6,8 @@
 ## which one should be used.  If this variable isn't set then the
 ## bigfloat module will make an attempt to find the library itself.
 ##
-mpfr_library_location = '/opt/local/lib/libmpfr.dylib'
+## Here's an example that's suitable for an OS X machine using MacPorts:
+# mpfr_library_location = '/opt/local/lib/libmpfr.dylib'
 
 ## Set 'gmp_mp_size_t_int' to True if GMP uses the C 'int' type for
 ## mp_size_t and mp_exp_t, and to False if is uses the C 'long' type
Remove hardcoded MPFR library location from configuration file