diff --git a/src/blobtool.cpp b/src/blobtool.cpp
index c1e2e65..463849d 100644
--- a/src/blobtool.cpp
+++ b/src/blobtool.cpp
@@ -6,6 +6,7 @@
 
 #include <algorithm>
 #include <fstream>
+#include <iostream>
 #include <nlohmann/json.hpp>
 #include <stdplus/print.hpp>