1 files changed, 1 insertions, 0 deletions
diff --git a/staptree.cxx b/staptree.cxx
index 8fb41ab6..08b2abae 100644
--- a/staptree.cxx
+++ b/staptree.cxx
@@ -15,6 +15,7 @@
 #include <typeinfo>
 #include <sstream>
 #include <cassert>
+#include <algorithm>
 
 using namespace std;