diff --git a/tutorials/c++/t10.cpp b/tutorials/c++/t10.cpp
index 4c0d1061c2ef7e260dadd25fef92a4cf11858b52..29b4bce56328e6f1bbcf621679c1640a09845350 100644
--- a/tutorials/c++/t10.cpp
+++ b/tutorials/c++/t10.cpp
@@ -12,6 +12,7 @@
 
 #include <set>
 #include <sstream>
+#include <algorithm>
 #include <gmsh.h>
 
 int main(int argc, char **argv)