diff --git a/src/libslic3r/libslic3r.h b/src/libslic3r/libslic3r.h
index 54344c618..c7d9f7854 100644
--- a/src/libslic3r/libslic3r.h
+++ b/src/libslic3r/libslic3r.h
@@ -16,6 +16,7 @@
 #include <stdarg.h>
 #include <vector>
 #include <cassert>
+#include <cmath>
 
 #include "Technologies.hpp"