diff --git a/tool/trace_tool/src/Main.cpp b/tool/trace_tool/src/Main.cpp
index 2c07dc2d..2bb79a73 100644
--- a/tool/trace_tool/src/Main.cpp
+++ b/tool/trace_tool/src/Main.cpp
@@ -6,6 +6,7 @@
 #include <set>
 #include <string>
 #include <vector>
+#include <iomanip> // for std::put_time
 
 using minecpp::nbt::CompoundContent;
 
@@ -100,4 +101,4 @@ int main(int argc, char **argv)
    }
 
    return 0;
-}
\ No newline at end of file
+}