diff --git a/build b/build
index eeee822..5d44c1f 100755
--- a/build
+++ b/build
@@ -75,6 +75,7 @@ copy_dir() {
 }
 
 concat_ftdetect() {
+  cat config.vim >> tmp/polyglot.vim
   for f in ftdetect/*; do (echo '" '"$f"; cat "${f}"; echo) >> tmp/polyglot.vim; done
   rm -f ftdetect/*
   mv tmp/polyglot.vim ftdetect/
diff --git a/config.vim b/config.vim
new file mode 100644
index 0000000..5ce9bd8
--- /dev/null
+++ b/config.vim
@@ -0,0 +1,4 @@
+" Enable jsx syntax by default
+if !exists('g:jsx_ext_required')
+  let g:jsx_ext_required = 0
+endif
diff --git a/ftdetect/polyglot.vim b/ftdetect/polyglot.vim
index 8f34352..c6e1649 100644
--- a/ftdetect/polyglot.vim
+++ b/ftdetect/polyglot.vim
@@ -1,3 +1,7 @@
+" Enable jsx syntax by default
+if !exists('g:jsx_ext_required')
+  let g:jsx_ext_required = 0
+endif
 " ftdetect/ansible.vim
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'ansible') == -1