diff --git a/src/File.php b/src/File.php
index 8cc56721..0e76d709 100644
--- a/src/File.php
+++ b/src/File.php
@@ -218,7 +218,10 @@ public static function move($src, $dest, $path = '', $useStreams = false)
 	 */
 	public static function write($file, &$buffer, $useStreams = false, $appendToFile = false)
 	{
-		@set_time_limit(ini_get('max_execution_time'));
+		if (\function_exists('set_time_limit'))
+		{
+			set_time_limit(ini_get('max_execution_time'));
+		}
 
 		// If the destination directory doesn't exist we need to create it
 		if (!file_exists(\dirname($file)))
diff --git a/src/Folder.php b/src/Folder.php
index d29176f6..64ce42d8 100644
--- a/src/Folder.php
+++ b/src/Folder.php
@@ -33,7 +33,10 @@ abstract class Folder
 	 */
 	public static function copy($src, $dest, $path = '', $force = false, $useStreams = false)
 	{
-		@set_time_limit(ini_get('max_execution_time'));
+		if (\function_exists('set_time_limit'))
+		{
+			@set_time_limit(ini_get('max_execution_time'));
+		}
 
 		if ($path)
 		{