diff --git a/daggy/src/executors/task/SlurmTaskExecutor.cpp b/daggy/src/executors/task/SlurmTaskExecutor.cpp
index 5a0aa9d..c0fad0b 100644
--- a/daggy/src/executors/task/SlurmTaskExecutor.cpp
+++ b/daggy/src/executors/task/SlurmTaskExecutor.cpp
@@ -1,3 +1,4 @@
+#include <iomanip>
 #include <iterator>
 #include <mutex>
 #include <stdexcept>