diff --git configure.in configure.in
index 1853029..559bd45 100644
--- configure.in
+++ configure.in
@@ -2651,7 +2651,7 @@ if test "$ac_cv_sockaddr_sa_len" = true ; then
   AC_DEFINE(HAVE_SA_LEN)
 fi
 
-AC_ARG_ENABLE(dtrace,
+MOZ_ARG_ENABLE_BOOL(dtrace,
               [  --enable-dtrace         build with dtrace support if available (default=no)],
               [enable_dtrace="yes"],)
 if test "x$enable_dtrace" = "xyes"; then
diff --git js/src/configure.in js/src/configure.in
index 134dfd3..682c1fb 100644
--- js/src/configure.in
+++ js/src/configure.in
@@ -2153,7 +2153,7 @@ dnl Quota support
 MOZ_CHECK_HEADERS(sys/quota.h)
 MOZ_CHECK_HEADERS(linux/quota.h)
 
-AC_ARG_ENABLE(dtrace,
+MOZ_ARG_ENABLE_BOOL(dtrace,
               [  --enable-dtrace         build with dtrace support if available (default=no)],
               [enable_dtrace="yes"],)
 if test "x$enable_dtrace" = "xyes"; then