diff --git a/prom_servers.py b/prom_servers.py
index 4384439..d89dc95 100644
--- a/prom_servers.py
+++ b/prom_servers.py
@@ -53,6 +53,7 @@ def prom_servers(PREFIX, baysInUseCount, servers):
             health = 1
         elif servers[n][3] == 'Failed':
             health = 0
+            errors += 1
         else:
             health = 'NaN'
             warn("unknown health on blade '" + servers[n][1] + "' in enc " + servers[n][8] + " bay " + str(servers[n][0]) + "." )