diff --git a/FHEM/00_FBAHA.pm b/FHEM/00_FBAHA.pm
index 83dc8c6ac..404e28f9a 100755
--- a/FHEM/00_FBAHA.pm
+++ b/FHEM/00_FBAHA.pm
@@ -261,6 +261,11 @@ FBAHA_Read($@)
   my $msg;
   while(length($data) >= 16) {
     my $len = hex(substr($data, 4,4))*2;
+    if($len < 16 || $len > 10240) { # Out of Sync
+      Log 1, "FBAHA: resetting buffer as we are out of sync ($len)";
+      $hash->{PARTIAL} = "";
+      return "";
+    }
     last if($len > length($data));
     $msg = substr($data, 0, $len);
     $data = substr($data, $len);