diff --git a/application/basilisk/configure.in b/application/basilisk/configure.in
index 8527d218c6..60e5f1b41d 100644
--- a/application/basilisk/configure.in
+++ b/application/basilisk/configure.in
@@ -16,6 +16,14 @@ AC_SUBST(MC_BASILISK)
 
 dnl Optional parts of the build.
 
+dnl ========================================================
+dnl = Disable Sync
+dnl ========================================================
+MOZ_ARG_DISABLE_BOOL(sync,
+[  --disable-sync           Disable Sync],
+    MOZ_SERVICES_SYNC=,
+    MOZ_SERVICES_SYNC=1)
+
 dnl ========================================================
 dnl = Disable WebExtensions
 dnl ========================================================
@@ -28,4 +36,4 @@ if test -n "$MOZ_WEBEXTENSIONS"; then
     AC_DEFINE(MOZ_WEBEXTENSIONS)
 fi
 
-AC_SUBST(MOZ_WEBEXTENSIONS)
\ No newline at end of file
+AC_SUBST(MOZ_WEBEXTENSIONS)