diff --git a/libzeitgeist/Makefile.am b/libzeitgeist/Makefile.am
index f44e950..2692a54 100644
--- a/libzeitgeist/Makefile.am
+++ b/libzeitgeist/Makefile.am
@@ -31,6 +31,8 @@ AM_VALAFLAGS = \
 	--pkg gio-2.0 \
 	--pkg gio-unix-2.0 \
 	--pkg sqlite3 \
+	--pkg posix \
+	--pkg linux \
 	$(top_srcdir)/config.vapi \
 	-C \
 	$(NULL)
diff --git a/libzeitgeist/log.vala b/libzeitgeist/log.vala
index 02b16ca..65e7367 100644
--- a/libzeitgeist/log.vala
+++ b/libzeitgeist/log.vala
@@ -58,9 +58,6 @@ namespace Zeitgeist
  */
 public class Log : QueuedProxyWrapper
 {
-    [CCode (cheader_filename = "sys/sysinfo.h", cname = "get_nprocs_conf")]
-    extern static int get_nprocs_conf ();
-
     class DbWorker
     {
         private unowned ThreadFunc<void*> func;
@@ -141,7 +138,7 @@ public class Log : QueuedProxyWrapper
         try {
             threads = new ThreadPool<DbWorker>.with_owned_data ((worker) => {
                 worker.run ();
-            }, get_nprocs_conf (), true);
+            }, (int) Posix.sysconf (Linux._SC_NPROCESSORS_CONF), true);
         } catch (ThreadError err) {
             warning ("%s", err.message);
             threads = null;