diff --git a/htdocs/core/class/conf.class.php b/htdocs/core/class/conf.class.php
index 2d9fb472407..e456effe66e 100644
--- a/htdocs/core/class/conf.class.php
+++ b/htdocs/core/class/conf.class.php
@@ -466,7 +466,7 @@ class Conf
         		throw new Exception('Log handler does not extend LogHandlerInterface');
         	}
 
-        	$this->loghandlers[]=$loghandlerinstance;
+        	if (empty($conf->loghandlers[$handler])) $this->loghandlers[$handler]=$loghandlerinstance;
         }
 	}
 }
diff --git a/htdocs/install/inc.php b/htdocs/install/inc.php
index f078f7a1802..12c58371b29 100644
--- a/htdocs/install/inc.php
+++ b/htdocs/install/inc.php
@@ -228,7 +228,7 @@ foreach ($handlers as $handler)
 		throw new Exception('Log handler does not extend LogHandlerInterface');
 	}
 
-	$conf->loghandlers[]=$loghandlerinstance;
+	if (empty($conf->loghandlers[$handler])) $conf->loghandlers[$handler]=$loghandlerinstance;
 }
 
 // Removed magic_quotes
@@ -331,7 +331,7 @@ function conf($dolibarr_main_document_root)
     		throw new Exception('Log handler does not extend LogHandlerInterface');
     	}
     
-    	$conf->loghandlers[]=$loghandlerinstance;
+    	if (empty($conf->loghandlers[$handler])) $conf->loghandlers[$handler]=$loghandlerinstance;
     }
     
     return 1;