diff --git a/src/ServerRequest.php b/src/ServerRequest.php
index 604bf9ae..7a50d848 100644
--- a/src/ServerRequest.php
+++ b/src/ServerRequest.php
@@ -136,12 +136,27 @@ public static function fromGlobals()
     public static function getUriFromGlobals() {
         $uri = new Uri('');
 
-        return $uri
-            ->withScheme(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on' ? 'https' : 'http')
-            ->withHost($_SERVER['SERVER_NAME'])
-            ->withPort($_SERVER['SERVER_PORT'])
-            ->withPath(current(explode('?', $_SERVER['REQUEST_URI'])))
-            ->withQuery(isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : '');
+        if (isset($_SERVER['HTTPS'])) {
+            $uri = $uri->withScheme($_SERVER['HTTPS'] == 'on' ? 'https' : 'http');
+        }
+
+        if (isset($_SERVER['SERVER_NAME'])) {
+            $uri = $uri->withHost($_SERVER['SERVER_NAME']);
+        }
+
+        if (isset($_SERVER['SERVER_PORT'])) {
+            $uri = $uri->withPort($_SERVER['SERVER_PORT']);
+        }
+
+        if (isset($_SERVER['REQUEST_URI'])) {
+            $uri = $uri->withPath(current(explode('?', $_SERVER['REQUEST_URI'])));
+        }
+
+        if (isset($_SERVER['QUERY_STRING'])) {
+            $uri = $uri->withQuery($_SERVER['QUERY_STRING']);
+        }
+
+        return $uri;
     }
 
     /**
diff --git a/tests/ServerRequestTest.php b/tests/ServerRequestTest.php
index 8810ee14..66703b30 100644
--- a/tests/ServerRequestTest.php
+++ b/tests/ServerRequestTest.php
@@ -325,6 +325,10 @@ public function dataGetUriFromGlobals()
                 'http://www.blakesimpson.co.uk:8324/blog/article.php?id=10&user=foo',
                 array_merge($server, ['SERVER_PORT' => '8324']),
             ],
+            'Empty server variable' => [
+                '',
+                [],
+            ],
         ];
     }