diff --git a/GNUmakefile b/GNUmakefile
index 837f7103f..d0894dbbf 100755
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -17,14 +17,14 @@ help: ## Display this help menu
 clean: ## Clear the application cache
 	rm -rf var/cache/*
 
-install: customcss ## Install wallabag with the latest version
+install: ## Install wallabag with the latest version
 	@./scripts/install.sh $(ENV)
 
 update: ## Update the wallabag installation to the latest version
 	@./scripts/update.sh $(ENV)
 
 dev: ENV=dev
-dev: build customcss ## Install the latest dev version
+dev: build ## Install the latest dev version
 	@./scripts/dev.sh
 
 run: ## Run the wallabag built-in server
@@ -34,9 +34,6 @@ build: ## Run webpack
 	@npm install
 	@npm run build:$(ENV)
 
-customcss:
-	@touch web/custom.css
-
 prepare: clean ## Prepare database for testsuite
 ifdef DB
 	cp app/config/tests/parameters_test.$(DB).yml app/config/parameters_test.yml
diff --git a/app/config/services.yml b/app/config/services.yml
index 25bbe5dc0..c2c867cf0 100644
--- a/app/config/services.yml
+++ b/app/config/services.yml
@@ -16,6 +16,7 @@ services:
             - "@security.token_storage"
             - "%wallabag_core.cache_lifetime%"
             - "@translator"
+            - "%kernel.root_dir%"
         tags:
             - { name: twig.extension }
 
diff --git a/src/Wallabag/CoreBundle/Resources/views/base.html.twig b/src/Wallabag/CoreBundle/Resources/views/base.html.twig
index 496b3fb6b..2486172d5 100644
--- a/src/Wallabag/CoreBundle/Resources/views/base.html.twig
+++ b/src/Wallabag/CoreBundle/Resources/views/base.html.twig
@@ -44,7 +44,9 @@
 
             {% block css %}
             {% endblock %}
-            <link rel="stylesheet" href="{{ asset('custom.css') }}">
+            {% if asset_file_exists('custom.css') %}
+                <link rel="stylesheet" href="{{ asset('custom.css') }}">
+            {% endif %}
             {% block scripts %}
             <script src="{{ asset('bundles/fosjsrouting/js/router.js') }}"></script>
             <script src="{{ path('fos_js_routing_js', { callback: 'fos.Router.setData' }) }}"></script>
diff --git a/src/Wallabag/CoreBundle/Twig/WallabagExtension.php b/src/Wallabag/CoreBundle/Twig/WallabagExtension.php
index 02f17f50a..47af3c8ec 100644
--- a/src/Wallabag/CoreBundle/Twig/WallabagExtension.php
+++ b/src/Wallabag/CoreBundle/Twig/WallabagExtension.php
@@ -18,14 +18,16 @@ class WallabagExtension extends AbstractExtension implements GlobalsInterface
     private $tagRepository;
     private $lifeTime;
     private $translator;
+    private $rootDir;
 
-    public function __construct(EntryRepository $entryRepository, TagRepository $tagRepository, TokenStorageInterface $tokenStorage, $lifeTime, TranslatorInterface $translator)
+    public function __construct(EntryRepository $entryRepository, TagRepository $tagRepository, TokenStorageInterface $tokenStorage, $lifeTime, TranslatorInterface $translator, string $rootDir)
     {
         $this->entryRepository = $entryRepository;
         $this->tagRepository = $tagRepository;
         $this->tokenStorage = $tokenStorage;
         $this->lifeTime = $lifeTime;
         $this->translator = $translator;
+        $this->rootDir = $rootDir;
     }
 
     public function getGlobals()
@@ -48,6 +50,7 @@ class WallabagExtension extends AbstractExtension implements GlobalsInterface
             new TwigFunction('count_entries', [$this, 'countEntries']),
             new TwigFunction('count_tags', [$this, 'countTags']),
             new TwigFunction('display_stats', [$this, 'displayStats']),
+            new TwigFunction('asset_file_exists', [$this, 'assetFileExists']),
         ];
     }
 
@@ -165,6 +168,11 @@ class WallabagExtension extends AbstractExtension implements GlobalsInterface
         ]);
     }
 
+    public function assetFileExists($name)
+    {
+        return file_exists(realpath($this->rootDir . '/../web/' . $name));
+    }
+
     public function getName()
     {
         return 'wallabag_extension';
diff --git a/tests/Wallabag/CoreBundle/Twig/WallabagExtensionTest.php b/tests/Wallabag/CoreBundle/Twig/WallabagExtensionTest.php
index 39fcec165..db02cb9cf 100644
--- a/tests/Wallabag/CoreBundle/Twig/WallabagExtensionTest.php
+++ b/tests/Wallabag/CoreBundle/Twig/WallabagExtensionTest.php
@@ -25,7 +25,7 @@ class WallabagExtensionTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
 
-        $extension = new WallabagExtension($entryRepository, $tagRepository, $tokenStorage, 0, $translator);
+        $extension = new WallabagExtension($entryRepository, $tagRepository, $tokenStorage, 0, $translator, '');
 
         $this->assertSame('lemonde.fr', $extension->removeWww('www.lemonde.fr'));
         $this->assertSame('lemonde.fr', $extension->removeWww('lemonde.fr'));
@@ -50,7 +50,7 @@ class WallabagExtensionTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
 
-        $extension = new WallabagExtension($entryRepository, $tagRepository, $tokenStorage, 0, $translator);
+        $extension = new WallabagExtension($entryRepository, $tagRepository, $tokenStorage, 0, $translator, '');
 
         $this->assertSame('lemonde.fr', $extension->removeScheme('lemonde.fr'));
         $this->assertSame('gist.github.com', $extension->removeScheme('gist.github.com'));
@@ -75,7 +75,7 @@ class WallabagExtensionTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
 
-        $extension = new WallabagExtension($entryRepository, $tagRepository, $tokenStorage, 0, $translator);
+        $extension = new WallabagExtension($entryRepository, $tagRepository, $tokenStorage, 0, $translator, '');
 
         $this->assertSame('lemonde.fr', $extension->removeSchemeAndWww('www.lemonde.fr'));
         $this->assertSame('lemonde.fr', $extension->removeSchemeAndWww('http://lemonde.fr'));