diff --git a/composer.json b/composer.json
index a5b5914e4..5f63f311d 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
 	"name": "qtism/qtism",
 	"description": "OAT QTI Software Module Library",
 	"type": "library",
-	"version": "0.9.21",
+	"version": "0.9.22",
 	"authors": [
 		{
 			"name": "Open Assessment Technologies S.A.",
diff --git a/qtism/common/datatypes/files/FileSystemFile.php b/qtism/common/datatypes/files/FileSystemFile.php
index 22d26df4d..7106a68df 100644
--- a/qtism/common/datatypes/files/FileSystemFile.php
+++ b/qtism/common/datatypes/files/FileSystemFile.php
@@ -75,11 +75,15 @@ class FileSystemFile implements File {
      * @throws RuntimeException If the file cannot be retrieved correctly.
      */
     public function __construct($path) {
+        $this->setPath($path);
+    }
+    
+    private function readInfo() {
         // Retrieve filename and mime type.
-        $fp = @fopen($path, 'r');
+        $fp = @fopen($this->getPath(), 'r');
         
         if ($fp === false) {
-            $msg = "Unable to retrieve QTI file at '${path}.";
+            $msg = "Unable to retrieve QTI file at '".$this->getPath().".";
             throw new RuntimeException($msg);
         }
         
@@ -95,7 +99,6 @@ public function __construct($path) {
         
         $this->setFilename($filename);
         $this->setMimeType($mimeType);
-        $this->setPath($path);
     }
     
     /**
@@ -121,10 +124,16 @@ protected function setMimeType($mimeType) {
     }
     
     public function getMimeType() {
+        if (is_null($this->mimeType)) {
+            $this->readInfo();
+        }
         return $this->mimeType;
     }
     
     public function getFilename() {
+        if (empty($this->filename)) {
+            $this->readInfo();
+        }
         return $this->filename;
     }
     
@@ -332,4 +341,4 @@ public function getIdentifier() {
     public function __toString() {
         return $this->getFilename();
     }
-}
\ No newline at end of file
+}
diff --git a/test/qtism/common/datatypes/files/FileSystemFileTest.php b/test/qtism/common/datatypes/files/FileSystemFileTest.php
index 9e284b899..8b51020ab 100644
--- a/test/qtism/common/datatypes/files/FileSystemFileTest.php
+++ b/test/qtism/common/datatypes/files/FileSystemFileTest.php
@@ -72,6 +72,7 @@ public function testGetStream($path, $expectedData) {
     public function testInstantiationWrongPath() {
         $this->setExpectedException('\\RuntimeException');
         $pFile = new FileSystemFile('/qtism/test');
+        $pFile->getFilename();
     }
     
     public function retrieveProvider() {
@@ -96,4 +97,4 @@ public function createFromExistingFileProvider() {
             array(self::samplesDir() . 'datatypes/file/raw/text.txt', 'text/plain', 'new-name.txt'),
         );
     }
-}
\ No newline at end of file
+}