diff --git a/configure.ac b/configure.ac
index 7901f47..a2ff5f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,6 +24,10 @@ if test "$enable_debug" = "yes"; then
 	AC_DEFINE([DEBUG], [1], [Define to compile with debugging support])
 fi
 
+AC_DEFINE([WMUD_TICK_LENGTH], [500], [Length of a game tick, in milliseconds])
+AC_DEFINE([WMUD_HEARTBEAT_LENGTH], [30], [Length of a heartbeat, in ticks])
+AC_DEFINE([WMUD_MAINTENANCE_TIME], [600], [Time between maintenance runs, in seconds])
+
 m4_ifdef([GTK_DOC_CHECK], [
 GTK_DOC_CHECK([1.14], [--flavour no-tmpl])
 ],[
diff --git a/wmud/game.c b/wmud/game.c
index 0596724..02b7024 100644
--- a/wmud/game.c
+++ b/wmud/game.c
@@ -17,6 +17,10 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <glib.h>
 
 #include "main.h"
@@ -71,7 +75,7 @@ rl_sec_elapsed(gpointer user_data)
 		elapsed_cycle++;
 	}
 
-	if (elapsed_ticks % 30 == 0) {
+	if (elapsed_ticks % WMUD_HEARTBEAT_LENGTH == 0) {
 		g_log(G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, "Heartbeat");
 	}
 
@@ -108,7 +112,7 @@ wmud_game_init(GThread **game_thread, GMainContext **game_context)
 
 	/* Create the timeout source which keeps track of elapsed real-world
 	 * time */
-	timeout_source = g_timeout_source_new(1000);
+	timeout_source = g_timeout_source_new(WMUD_TICK_LENGTH);
 	g_source_set_callback(timeout_source, rl_sec_elapsed, NULL, NULL);
 	g_source_attach(timeout_source, *game_context);
 	g_source_unref(timeout_source);
diff --git a/wmud/maintenance.c b/wmud/maintenance.c
index 8bcfb70..efb596e 100644
--- a/wmud/maintenance.c
+++ b/wmud/maintenance.c
@@ -194,7 +194,7 @@ wmud_maintenance_init(void)
 	maint_loop = g_main_loop_new(maint_context, FALSE);
 
 	/* Create the timeout source which will do the maintenance tasks */
-	timeout_source = g_timeout_source_new_seconds(600);
+	timeout_source = g_timeout_source_new_seconds(WMUD_MAINTENANCE_TIME);
 	g_source_set_callback(timeout_source, wmud_maintenance, NULL, NULL);
 	g_source_attach(timeout_source, maint_context);
 	g_source_unref(timeout_source);