diff --git a/fhem/FHEM/00_FBAHAHTTP.pm b/fhem/FHEM/00_FBAHAHTTP.pm
index 8c1cd41d0..9b7612c63 100644
--- a/fhem/FHEM/00_FBAHAHTTP.pm
+++ b/fhem/FHEM/00_FBAHAHTTP.pm
@@ -18,6 +18,7 @@ FBAHAHTTP_Initialize($)
   $hash->{SetFn}    = "FBAHAHTTP_Set";
   $hash->{AttrFn}   = "FBAHAHTTP_Attr";
   $hash->{ReadyFn}  = "FBAHAHTTP_Ready";
+  $hash->{RenameFn} = "FBAHAHTTP_RenameFn";
   $hash->{AttrList} = "dummy:1,0 fritzbox-user polltime async_delay ".
                       "disable:0,1 disabledForIntervals";
 }
@@ -89,6 +90,19 @@ FBAHAHTTP_connect($)
   return undef;
 }
 
+sub
+FBAHAHTTP_RenameFn($$)
+{
+  my ($new, $old) = @_;
+  for my $d (devspec2array("TYPE=FBDECT")) {
+    my $hash = $defs{$d};
+    next if(!$hash);
+    $hash->{DEF} =~ s/^$old:/$new:/;
+    $attr{$d}{IODev} = $new if(AttrVal($d,"IODev","") eq $old);
+  }
+  FBDECT_renameIoDev($new, $old);
+}
+
 #####################################
 sub
 FBAHAHTTP_Poll($)
diff --git a/fhem/FHEM/10_FBDECT.pm b/fhem/FHEM/10_FBDECT.pm
index ea4b2d9f0..18fdefc26 100644
--- a/fhem/FHEM/10_FBDECT.pm
+++ b/fhem/FHEM/10_FBDECT.pm
@@ -281,6 +281,20 @@ FBDECT_ParseHttp($$$)
   return $hash->{NAME};
 }
 
+sub
+FBDECT_renameIoDev($$)  # Called from FBAHAHTTP
+{
+  my ($new, $old) = @_;
+  my $dp = $modules{FBDECT}{defptr};
+  for my $ok (keys %{$dp}) {
+    my $nk = $ok;
+    $nk =~ s/^$old:/$new:/;
+    next if($nk eq $ok);
+    $dp->{$nk} = $dp->{$ok};
+    delete $dp->{$ok};
+  }
+}
+
 ###################################
 sub
 FBDECT_Parse($$@)