diff --git a/fhem.pl b/fhem.pl
index 29bbf44e4..4b0e97525 100755
--- a/fhem.pl
+++ b/fhem.pl
@@ -65,6 +65,7 @@ sub IOWrite($@);
 sub InternalTimer($$$$);
 sub IsDummy($);
 sub IsIgnored($);
+sub IsDisabled($);
 sub LoadModule($);
 sub Log($$);
 sub OpenLogfile($);
@@ -516,6 +517,19 @@ IsIgnored($)
   return 0;
 }
 
+sub
+IsDisabled($)
+{
+  my $devname = shift;
+  if($devname &&
+     defined($attr{$devname}) &&
+     defined($attr{$devname}{disable})) {
+    Log 4, "Disabled $devname";
+    return 1;
+  }
+  return 0;
+}
+
 
 ################################################
 sub