diff --git a/core/attributedef.class.inc.php b/core/attributedef.class.inc.php
index 2aef62370..4e6017c21 100644
--- a/core/attributedef.class.inc.php
+++ b/core/attributedef.class.inc.php
@@ -8988,12 +8988,15 @@ class AttributeStopWatch extends AttributeDefinition
 						switch ($sThresholdCode) {
 							case 'deadline':
 								if ($value) {
-									if (is_int($value)) {
+                                    if (is_numeric($value)) {
+                                        if (!is_int($value)) {
+                                            $value = intval($value);
+                                        }
 										$sDate = date(AttributeDateTime::GetInternalFormat(), $value);
 										$sRet = AttributeDeadline::FormatDeadline($sDate);
-									} else {
-										$sRet = $value;
-									}
+                                    } else {
+                                        $sRet = $value;
+                                    }
 								} else {
 									$sRet = '';
 								}
diff --git a/tests/php-unit-tests/unitary-tests/core/AttributeDefinitionTest.php b/tests/php-unit-tests/unitary-tests/core/AttributeDefinitionTest.php
index 5c4e620a4..48b638fac 100644
--- a/tests/php-unit-tests/unitary-tests/core/AttributeDefinitionTest.php
+++ b/tests/php-unit-tests/unitary-tests/core/AttributeDefinitionTest.php
@@ -340,4 +340,20 @@ PHP
 		return $oAttribute;
 	}
 
+    public function testDisplayStopwatch()
+    {
+        $aUserRequestCustomParams = [
+            'title' => "Test DisplayStopwatch",
+        ];
+        $oUserRequest = $this->CreateUserRequest(456, $aUserRequestCustomParams);
+        $oAttDef = MetaModel::GetAttributeDef(get_class($oUserRequest), 'ttr_escalation_deadline');
+        $iStartDate = time() - 200;
+
+        $oStopwatch = $oUserRequest->Get('ttr');
+        $oStopwatch->DefineThreshold(100, $iStartDate);
+        $oUserRequest->Set('ttr', $oStopwatch);
+        $value = $oUserRequest->Get('ttr_escalation_deadline');
+        $sRet = $oAttDef->GetAsPlainText($value, $oUserRequest);
+        self::assertEquals('Missed by 3 min', $sRet);
+    }
 }