--- a/configure.ac	2018-01-23 13:51:01.448703701 -0500
+++ b/configure.ac	2018-01-23 13:51:12.212980866 -0500
@@ -27,7 +27,7 @@
 # Checks for libraries.
 AC_CHECK_LIB([m], [log10])
 AC_CHECK_LIB([rt], [clock_gettime])
-###AC_CHECK_LIB([pthread], [pthread_self], , AC_MSG_ERROR(FastBit requires pthread support))
+AC_CHECK_LIB([pthread], [pthread_self], , AC_MSG_ERROR(FastBit requires pthread support))

 # Checks for header files.
 #AC_HEADER_STDC