diff --git a/FHEM/33_readingsGroup.pm b/FHEM/33_readingsGroup.pm
index 74d38fa8f..1568ff786 100644
--- a/FHEM/33_readingsGroup.pm
+++ b/FHEM/33_readingsGroup.pm
@@ -28,8 +28,8 @@ use vars qw(%defs);
 use vars qw(%attr);
 use vars qw($init_done);
 use vars qw($lastDefChange);
-sub Log;
-sub Log3;
+sub Log($$);
+sub Log3($$$);
 
 use vars qw(%data);
 use vars qw($FW_ME);
diff --git a/FHEM/33_readingsHistory.pm b/FHEM/33_readingsHistory.pm
index a06cc0a9b..de8d80035 100644
--- a/FHEM/33_readingsHistory.pm
+++ b/FHEM/33_readingsHistory.pm
@@ -27,8 +27,8 @@ use POSIX qw(strftime);
 
 use vars qw(%defs);
 use vars qw(%attr);
-sub Log;
-sub Log3;
+sub Log($$);
+sub Log3($$$);
 
 use vars qw($FW_ME);
 use vars qw($FW_wname);
diff --git a/FHEM/33_readingsProxy.pm b/FHEM/33_readingsProxy.pm
index e622345d3..0dbdc6307 100644
--- a/FHEM/33_readingsProxy.pm
+++ b/FHEM/33_readingsProxy.pm
@@ -29,8 +29,8 @@ use vars qw(%defs);
 use vars qw(%attr);
 use vars qw($readingFnAttributes);
 use vars qw($init_done);
-sub Log;
-sub Log3;
+sub Log($$);
+sub Log3($$$);
 
 sub readingsProxy_Initialize($)
 {
diff --git a/FHEM/39_alexa.pm b/FHEM/39_alexa.pm
index 7c6a1a41c..4ecfc7b0c 100644
--- a/FHEM/39_alexa.pm
+++ b/FHEM/39_alexa.pm
@@ -13,8 +13,8 @@ use vars qw(%modules);
 use vars qw(%defs);
 use vars qw(%attr);
 use vars qw($readingFnAttributes);
-sub Log;
-sub Log3;
+sub Log($$);
+sub Log3($$$);
 
 sub
 alexa_Initialize($)
diff --git a/FHEM/39_siri.pm b/FHEM/39_siri.pm
index 0ec5d9338..eb865b3c7 100644
--- a/FHEM/39_siri.pm
+++ b/FHEM/39_siri.pm
@@ -10,8 +10,8 @@ use vars qw(%modules);
 use vars qw(%defs);
 use vars qw(%attr);
 use vars qw($readingFnAttributes);
-sub Log;
-sub Log3;
+sub Log($$);
+sub Log3($$$);
 
 sub
 siri_Initialize($)