diff --git a/DescriptorManager.h b/DescriptorManager.h
index 7f876ac..7b74188 100644
--- a/DescriptorManager.h
+++ b/DescriptorManager.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <iostream> 
+#include <iomanip>
 #include <bitset>
 #include <climits>
 #include <set>