diff --git a/tools/jfjoch_process.cpp b/tools/jfjoch_process.cpp
index 79702b50..54e32e84 100644
--- a/tools/jfjoch_process.cpp
+++ b/tools/jfjoch_process.cpp
@@ -15,6 +15,7 @@
 #include <algorithm>
 #include <numeric>
 #include <cmath>
+#include <set>
 
 #include "../reader/JFJochHDF5Reader.h"
 #include "../common/Logger.h"