diff --git a/build-tools/build-minidex b/build-tools/build-minidex
index d898e1150..07b8a5db0 100755
--- a/build-tools/build-minidex
+++ b/build-tools/build-minidex
@@ -93,6 +93,7 @@ function updateSizes() {
 }
 
 if (fs.existsSync('sprites/')) {
+	updateSizes();
 	console.log('DONE');
 } else {
 	console.log('SKIPPED');