diff --git a/check_apaches.py b/check_apaches.py
index 46d4adf..011aea2 100755
--- a/check_apaches.py
+++ b/check_apaches.py
@@ -71,6 +71,18 @@ class CheckApaches(MonitoringPlugin):
 		pass
 
 
+	def check_slots(self, target='open', warn='', crit=''):
+		pd = {'label':'slots_open', 'unit':'', 'warn':warn, 'crit': crit, 'min':0}
+
+		if target == 'open':
+			returncode = self.value_wc_to_returncode(self.apache_states['.'], warn, crit)
+			output = '%d open slots' % self.apache_states['.']
+			pd['value'] = self.apache_states['.']
+			pd['label'] = 'slots_open'
+
+		return self.remember_check('slots', returncode, output, perfdata=[pd], target=target)
+
+
 	def check_worker(self, target='busy', warn='', crit=''):
 		pd = {'label':'worker_busy', 'unit':'', 'warn':warn, 'crit': crit, 'min':0}
 
@@ -176,7 +188,9 @@ def main():
 	for quad in checks:
 		(check, target, warn, crit) = tuple(quad)
 
-		if check == 'worker':
+		if check == 'slots':
+			result = plugin.check_slots(target, warn, crit)
+		elif check == 'worker':
 			result = plugin.check_worker(target, warn, crit)
 		else:
 			result = plugin.remember_check(check, plugin.RETURNCODE['UNKNOWN'], 'Unknown check "' + check + '"!')