diff --git a/check_eol b/check_eol
index 2a852a9236263b32237e27096827098a27494a16..37e73281279dfb381c84b3570ce66c8df275ff6f 100755
--- a/check_eol
+++ b/check_eol
@@ -48,6 +48,7 @@
 # 2021-11-02  v1.3  <axel.hahn@iml.unibe.ch> detect centos stream
 # 2022-02-28  v1.4  <axel.hahn@iml.unibe.ch> remove negative performance data
 # 2022-08-29  v1.5  <axel.hahn@iml.unibe.ch> fix help; shell syntax updates 
+# 2023-01-30  v1.6  <axel.hahn@unibe.ch>     add max value in performance data
 # ======================================================================
 
 . "$( dirname $0 )/inc_pluginfunctions"
@@ -261,8 +262,7 @@ else
         echo "Limit Info: warn below $iDaysWarn days; critical below $iDaysCritical days"
         
         test ${myDaysLeft} -lt 0 && myDaysLeft=0
-        ph.perfadd "$myKey-v$myEolVer" "${myDaysLeft}" $iDaysWarn $iDaysCritical 0
-
+        ph.perfadd "$myKey-v$myEolVer" "${myDaysLeft}" $iDaysWarn $iDaysCritical 0 100
 
 fi
 
diff --git a/inc_pluginfunctions b/inc_pluginfunctions
index 7471547a90c9dc925bd7e78afab08685da4c5bd3..dca76fef66d10d3ea98d55766166a96a53e4f471 100644
--- a/inc_pluginfunctions
+++ b/inc_pluginfunctions
@@ -31,6 +31,7 @@
 # 2020-09-01  v1.3  <axel.hahn@iml.unibe.ch> added ph.hasParamoption
 # 2022-08-31  v1.4  <axel.hahn@iml.unibe.ch> shellfix corrections
 # 2022-10-25  v1.5  <axel.hahn@iml.unibe.ch> handle empty value in ph.perfadd
+# 2023-01-30  v1.6  <axel.hahn@unibe.ch>     check performance params 5+6 and show a warning if missing
 # ======================================================================
 
 
@@ -439,7 +440,10 @@ function ph.perfadd(){
   local _max=$6
 
   test -z "$_value" && _value=0
+  test -z "$_min"   && echo "WARNING from ph.perfadd: missing param 5 for minimum - setting it to 0"
   test -z "$_min"   && _min=0
+  test -z "$_max"   && echo "WARNING from ph.perfadd: missing param 6 for maxiumun - setting it to 100"
+  test -z "$_max"   && _max=100
   
   echo "${_label}=${_value};${_w};${_c};${_min};${_max}" >>"${ph_perfdatafile}"
 }