Index: include/modules/cpu.hpp
--- include/modules/cpu.hpp.orig
+++ include/modules/cpu.hpp
@@ -10,7 +10,13 @@ namespace modules {
   struct cpu_time {
     unsigned long long user;
     unsigned long long nice;
+#ifdef __OpenBSD__
+    unsigned long long sys;
+    unsigned long long spin;
+    unsigned long long intr;
+#else
     unsigned long long system;
+#endif
     unsigned long long idle;
     unsigned long long steal;
     unsigned long long total;