diff --git a/library/Director/IcingaConfig/IcingaConfigHelper.php b/library/Director/IcingaConfig/IcingaConfigHelper.php
index 0e52b4ce..5f11eb31 100644
--- a/library/Director/IcingaConfig/IcingaConfigHelper.php
+++ b/library/Director/IcingaConfig/IcingaConfigHelper.php
@@ -218,16 +218,11 @@ class IcingaConfigHelper
         );
 
         foreach ($steps as $unit => $duration) {
-            if ($seconds >= $duration) {
-                $parts[] = (int) floor($seconds / $duration) . $unit;
-                $seconds = $seconds % $duration;
+            if ($seconds % $duration === 0) {
+                return (int) floor($seconds / $duration) . $unit;
             }
         }
 
-        if ($seconds > 0) {
-            $parts[] = $seconds . 's';
-        }
-
-        return implode(' ', $parts);
+        return $seconds . 's';
     }
 }
diff --git a/test/php/library/Director/IcingaConfig/IcingaConfigHelperTest.php b/test/php/library/Director/IcingaConfig/IcingaConfigHelperTest.php
index 9e05a694..5055a7e6 100644
--- a/test/php/library/Director/IcingaConfig/IcingaConfigHelperTest.php
+++ b/test/php/library/Director/IcingaConfig/IcingaConfigHelperTest.php
@@ -28,8 +28,9 @@ class IcingaConfigHelperTest extends BaseTestCase
     {
         $this->assertEquals(c::renderInterval(10), '10s');
         $this->assertEquals(c::renderInterval(60), '1m');
-        $this->assertEquals(c::renderInterval(121), '2m 1s');
+        $this->assertEquals(c::renderInterval(121), '121s');
+        $this->assertEquals(c::renderInterval(3600), '1h');
         $this->assertEquals(c::renderInterval(86400), '1d');
-        $this->assertEquals(c::renderInterval(86459), '1d 59s');
+        $this->assertEquals(c::renderInterval(86459), '86459s');
     }
 }