diff --git a/lib/Thruk/Controller/rest_v1.pm b/lib/Thruk/Controller/rest_v1.pm
index df0170fc7..1da872d06 100644
--- a/lib/Thruk/Controller/rest_v1.pm
+++ b/lib/Thruk/Controller/rest_v1.pm
@@ -2893,7 +2893,7 @@ sub _parse_columns_data {
             $name = shift @arg;
             push(@{$functions}, [$f, \@arg]);
         }
-        if(scalar @{$functions} == 0 && $name =~ m/[\+\*\-\/]/gmx) {
+        if(scalar @{$functions} == 0 && $name =~ m/.+[\+\*\-\/].+/gmx && $raw->[$x] !~ m/^`.*`$/mx) { # NO CRITIC BACKTICKS
             my $f = "_calc";
             push(@{$functions}, [$f, [$name]]);
         }
diff --git a/t/092-backticks.t b/t/092-backticks.t
index 8cbae0c6d..6baad75a0 100644
--- a/t/092-backticks.t
+++ b/t/092-backticks.t
@@ -21,6 +21,7 @@ for my $cmd (@{$cmds}) {
     chomp($line);
     $line =~ s/'.*?'//gmx;
     next if $line =~ m/nasty\ chars/mx;
+    next if $line =~ m/NO\ CRITIC\ BACKTICKS/mx;
     $line =~ s/\#.*$//gmx;
     next if($filter && $line !~ m%$filter%mx);
     next if $line =~ m%\QThruk/Utils/IO.pm:\E%mx;
diff --git a/t/scenarios/rest_api/t/local/rest_api_misc.t b/t/scenarios/rest_api/t/local/rest_api_misc.t
index 339245815..242ed6ad8 100644
--- a/t/scenarios/rest_api/t/local/rest_api_misc.t
+++ b/t/scenarios/rest_api/t/local/rest_api_misc.t
@@ -8,7 +8,7 @@ BEGIN {
     require TestUtils;
     import TestUtils;
 }
-plan tests => 76;
+plan tests => 94;
 
 ###########################################################
 # test thruks script path
@@ -114,3 +114,24 @@ $ENV{'THRUK_TEST_AUTH_USER'} = "omdadmin";
 }
 
 ###########################################################
+{
+    # make sure / columns do not interfer with calculations
+    TestUtils::test_command({
+        cmd     => '/usr/bin/env thruk r \'/services?columns=name,/\'',
+        like => ['/"\/"\s*:\s*\d+,/'],
+    });
+    TestUtils::test_command({
+        cmd     => '/usr/bin/env thruk r \'/services?columns=name,`/`\'',
+        like => ['/"\/"\s*:\s*\d+,/'],
+    });
+    TestUtils::test_command({
+        cmd     => '/usr/bin/env thruk r \'/services?columns=name,`/`,latency/5\'',
+        like => ['/"\/"\s*:\s*\d+,/', '/"latency\/5"/'],
+    });
+    TestUtils::test_command({
+        cmd     => '/usr/bin/env thruk r \'/services?columns=name,/,latency/5\'',
+        like => ['/"\/"\s*:\s*\d+,/', '/"latency\/5"/'],
+    });
+}
+
+###########################################################