diff --git a/isisd/isis_csm.c b/isisd/isis_csm.c
index 58a0b29..80d0c90 100644
--- a/isisd/isis_csm.c
+++ b/isisd/isis_csm.c
@@ -77,8 +77,8 @@
   int old_state;
 
   old_state = circuit ? circuit->state : C_STATE_NA;
-
-  zlog_debug ("CSM_EVENT: %s", EVENT2STR (event));
+  if (isis->debugs & DEBUG_EVENTS)
+    zlog_debug ("CSM_EVENT: %s", EVENT2STR (event));
 
   switch (old_state)
     {
@@ -178,8 +178,9 @@
       zlog_warn ("Invalid circuit state %d", old_state);
     }
 
-  zlog_debug ("CSM_STATE_CHANGE: %s -> %s ", STATE2STR (old_state),
-	      circuit ? STATE2STR (circuit->state) : STATE2STR (C_STATE_NA));
+  if (isis->debugs & DEBUG_EVENTS)
+    zlog_debug ("CSM_STATE_CHANGE: %s -> %s ", STATE2STR (old_state),
+		circuit ? STATE2STR (circuit->state) : STATE2STR (C_STATE_NA));
 
   return circuit;
 }