diff --git a/superkaramba/src/memsensor.cpp b/superkaramba/src/memsensor.cpp
index 4cc2e7d..98eceea 100644
--- a/superkaramba/src/memsensor.cpp
+++ b/superkaramba/src/memsensor.cpp
@@ -30,6 +30,7 @@
 #include <sys/sysctl.h>
 #include <sys/sched.h>
 #include <sys/swap.h>
+#include <uvm/uvm_extern.h>
 #endif
 
 #include <kprocio.h>