diff --git a/owrx/metrics.py b/owrx/metrics.py
index 063bd5c..c78838c 100644
--- a/owrx/metrics.py
+++ b/owrx/metrics.py
@@ -42,7 +42,7 @@ class Metrics(object):
         self.addMetric("openwebrx.users", DirectMetric(ClientRegistry.getSharedInstance().clientCount))
 
     def addMetric(self, name, metric):
-        name = name.replace(' ','_') 
+        name = name.replace(' ', '_') 
         self.metrics[name] = metric
 
     def hasMetric(self, name):