diff --git a/CHANGED b/CHANGED
index 213279195..97000f8bc 100644
--- a/CHANGED
+++ b/CHANGED
@@ -470,3 +470,4 @@
   - bugfix:  fht actuator message clarification by Klaus
   - feature: getstate command from Martin (25.12)
   - bugfix:  at drifts for relative timespecs
+  - bugfix:  Add IODev to CUL/EM/CUL_WS/HMS/KS300
diff --git a/FHEM/12_HMS.pm b/FHEM/12_HMS.pm
index ee6273f84..1fc78b609 100755
--- a/FHEM/12_HMS.pm
+++ b/FHEM/12_HMS.pm
@@ -57,7 +57,7 @@ HMS_Define($$)
 
   $hash->{CODE} = $a[2];
   $defptr{$a[2]} = $hash;
-
+  AssignIoPort($hash);
   return undef;
 }
 
diff --git a/FHEM/13_KS300.pm b/FHEM/13_KS300.pm
index 3a7be8a19..6d79075e4 100755
--- a/FHEM/13_KS300.pm
+++ b/FHEM/13_KS300.pm
@@ -43,6 +43,7 @@ KS300_Define($$)
   $hash->{RAINUNIT} = $rainunit;
   $hash->{WINDUNIT} = $windunit;
   $defptr{$a[2]} = $hash;
+  AssignIoPort($hash);
 
   return undef;
 }
diff --git a/FHEM/14_CUL_WS.pm b/FHEM/14_CUL_WS.pm
index bb04d65bc..95c7d9508 100755
--- a/FHEM/14_CUL_WS.pm
+++ b/FHEM/14_CUL_WS.pm
@@ -50,6 +50,7 @@ CUL_WS_Define($$)
   $hash->{corr3} = ((int(@a) > 5) ? $a[5] : 0);
   $hash->{corr4} = ((int(@a) > 6) ? $a[6] : 0);
   $defptr{$a[2]} = $hash;
+  AssignIoPort($hash);
   return undef;
 }
 
diff --git a/FHEM/15_CUL_EM.pm b/FHEM/15_CUL_EM.pm
index 8716c0617..ef866dfad 100755
--- a/FHEM/15_CUL_EM.pm
+++ b/FHEM/15_CUL_EM.pm
@@ -56,6 +56,7 @@ CUL_EM_Define($$)
     $hash->{corr2} = 1;
   }
   $defptr{$a[2]} = $hash;
+  AssignIoPort($hash);
   return undef;
 }