diff --git a/FHEM/33_readingsGroup.pm b/FHEM/33_readingsGroup.pm
index c91f31435..71440dedb 100644
--- a/FHEM/33_readingsGroup.pm
+++ b/FHEM/33_readingsGroup.pm
@@ -1945,7 +1945,7 @@ readingsGroup_Attr($$$;$)
this reading will be skipped. Can be given as a string, a perl expression returning a hash or a perl
expression returning a string, e.g.:
attr temperatures valueFormat %.1f °C
- attr temperatures valueFormat { temperature => "%.1f °C", humidity => "%i %" }
+ attr temperatures valueFormat { temperature => "%.1f °C", humidity => "%i %%" }
attr temperatures valueFormat { ($READING eq 'temperature')?"%.1f °C":undef }
attr temperatures valueFormat %.1f °C
attr temperatures valueFormat { temperature => "%.1f °C", humidity => "%i %" }
attr temperatures valueFormat { temperature => "%.1f °C", humidity => "%i %%" }
attr temperatures valueFormat { ($READING eq 'temperature')?"%.1f °C":undef }