diff --git a/src/libslic3r/ExtrusionEntity.hpp b/src/libslic3r/ExtrusionEntity.hpp
index 7e9e9eb540..2c43cd4af8 100644
--- a/src/libslic3r/ExtrusionEntity.hpp
+++ b/src/libslic3r/ExtrusionEntity.hpp
@@ -7,6 +7,7 @@
 
 #include <assert.h>
 #include <string_view>
+#include <numeric>
 
 namespace Slic3r {