Index: src/libslic3r/utils.cpp
--- src/libslic3r/utils.cpp.orig
+++ src/libslic3r/utils.cpp
@@ -79,7 +79,7 @@
     #include <tbb/task_scheduler_init.h>
 #endif
 
-#if defined(__linux__) || defined(__GNUC__ )
+#if defined(__linux__) || defined(__GNUC__ ) || defined(__OpenBSD__)
 #include <strings.h>
 #endif /* __linux__ */
 
