diff --git a/include/aligator/utils/exceptions.hpp b/include/aligator/utils/exceptions.hpp
index 2b726e322..8767ea95b 100644
--- a/include/aligator/utils/exceptions.hpp
+++ b/include/aligator/utils/exceptions.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <stdexcept>
+#include <string>
 #include <fmt/base.h>
 
 #define ALIGATOR_RUNTIME_ERROR(...)                                            \