diff --git a/configure.ac b/configure.ac
index caaff7e5..b77a505a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -228,7 +228,7 @@ AS_CASE([$host],
 	[POSIX=1]
 )
 AM_CONDITIONAL(HAVE_POSIX, [test x"$POSIX" != x])
-AM_CONDITIONAL(HAVE_DISK_ARBITRATION, [test "$(uname)" == Darwin])
+AM_CONDITIONAL(HAVE_DISK_ARBITRATION, [test "$(uname)" = Darwin])
 
 AC_ARG_ENABLE([profiler],
 	[AS_HELP_STRING([--enable-profiler],[enable the use of gprof for code coverage])],