diff --git a/lib/builder/builder.js b/lib/builder/builder.js
index 67f0217765..d61dce35e2 100644
--- a/lib/builder/builder.js
+++ b/lib/builder/builder.js
@@ -668,11 +668,15 @@ module.exports = class Builder {
       .on('unlink', refreshFiles)
 
     // Watch for custom provided files
-    const watchFiles = _.map(_.uniq(this.options.build.watch), p =>
+    let customPatterns = _.concat(
+      this.options.build.watch,
+      ..._.values(_.omit(this.options.build.styleResources, ['options']))
+    )
+    customPatterns = _.map(_.uniq(customPatterns), p =>
       upath.normalizeSafe(p)
     )
     this.customFilesWatcher = chokidar
-      .watch(watchFiles, options)
+      .watch(customPatterns, options)
       .on('change', refreshFiles)
   }