diff --git a/src/server/response.cpp b/src/server/response.cpp
index aefa0dc7..f87ffecb 100644
--- a/src/server/response.cpp
+++ b/src/server/response.cpp
@@ -101,7 +101,8 @@ HTTPErrorHtmlResponse::HTTPErrorHtmlResponse(const InternalServer& server,
                                              const RequestContext& request,
                                              int httpStatusCode,
                                              const std::string& pageTitleMsg,
-                                             const std::string& headingMsg)
+                                             const std::string& headingMsg,
+                                             const std::string& cssUrl)
   : ContentResponseBlueprint(&server,
                              &request,
                              httpStatusCode,
@@ -110,6 +111,7 @@ HTTPErrorHtmlResponse::HTTPErrorHtmlResponse(const InternalServer& server,
 {
   kainjow::mustache::list emptyList;
   this->m_data = kainjow::mustache::object{
+                    {"CSS_URL", onlyAsNonEmptyMustacheValue(cssUrl) },
                     {"PAGE_TITLE",   pageTitleMsg},
                     {"PAGE_HEADING", headingMsg},
                     {"details", emptyList}
diff --git a/src/server/response.h b/src/server/response.h
index 710e2bc0..1c93434e 100644
--- a/src/server/response.h
+++ b/src/server/response.h
@@ -184,7 +184,8 @@ struct HTTPErrorHtmlResponse : ContentResponseBlueprint
                       const RequestContext& request,
                       int httpStatusCode,
                       const std::string& pageTitleMsg,
-                      const std::string& headingMsg);
+                      const std::string& headingMsg,
+                      const std::string& cssUrl = "");
 
   using ContentResponseBlueprint::operator+;
   HTTPErrorHtmlResponse& operator+(const std::string& msg);
diff --git a/static/templates/error.html b/static/templates/error.html
index 5fcc0ff2..71108209 100644
--- a/static/templates/error.html
+++ b/static/templates/error.html
@@ -3,6 +3,9 @@
   <head>
     <meta content="text/html;charset=UTF-8" http-equiv="content-type" />
     <title>{{PAGE_TITLE}}</title>
+{{#CSS_URL}}
+    <link type="text/css" href="{{{CSS_URL}}}" rel="Stylesheet" />
+{{/CSS_URL}}
   </head>
   <body>
     <h1>{{PAGE_HEADING}}</h1>
diff --git a/test/server.cpp b/test/server.cpp
index 6467d44f..de36057c 100644
--- a/test/server.cpp
+++ b/test/server.cpp
@@ -430,7 +430,8 @@ std::string TestContentIn404HtmlResponse::expectedResponse() const
     R"FRAG(</title>
 )FRAG",
 
-    R"FRAG(  <link type="root" href="/ROOT"><link type="text/css" href="/ROOT/skin/jquery-ui/jquery-ui.min.css" rel="Stylesheet" />
+    R"FRAG(
+  <link type="root" href="/ROOT"><link type="text/css" href="/ROOT/skin/jquery-ui/jquery-ui.min.css" rel="Stylesheet" />
 <link type="text/css" href="/ROOT/skin/jquery-ui/jquery-ui.theme.min.css" rel="Stylesheet" />
 <link type="text/css" href="/ROOT/skin/taskbar.css" rel="Stylesheet" />
 <script type="text/javascript" src="/ROOT/skin/jquery-ui/external/jquery/jquery.js" defer></script>
@@ -497,8 +498,7 @@ std::string TestContentIn404HtmlResponse::pageCssLink() const
 
   return R"(    <link type="text/css" href=")"
        + expectedCssUrl
-       + R"(" rel="Stylesheet" />
-)";
+       + R"(" rel="Stylesheet" />)";
 }
 
 std::string TestContentIn404HtmlResponse::hiddenBookNameInput() const
@@ -769,6 +769,7 @@ TEST_F(ServerTest, 500)
   <head>
     <meta content="text/html;charset=UTF-8" http-equiv="content-type" />
     <title>Internal Server Error</title>
+
   </head>
   <body>
     <h1>Internal Server Error</h1>
