diff --git a/src/libslic3r/Geometry.cpp b/src/libslic3r/Geometry.cpp
index e5dfacc099..e926b99979 100644
--- a/src/libslic3r/Geometry.cpp
+++ b/src/libslic3r/Geometry.cpp
@@ -9,6 +9,7 @@
 #include <cmath>
 #include <list>
 #include <map>
+#include <numeric>
 #include <set>
 #include <utility>
 #include <stack>