diff --git a/source/net/filebot/cli/ScriptShellMethods.java b/source/net/filebot/cli/ScriptShellMethods.java
index 54618cc7..62ccde17 100644
--- a/source/net/filebot/cli/ScriptShellMethods.java
+++ b/source/net/filebot/cli/ScriptShellMethods.java
@@ -262,7 +262,7 @@ public class ScriptShellMethods {
 		return FileUtilities.copyAs(self, new File(destination, self.getName()));
 	}
 
-	public String getDisplaySize(File self) {
+	public static String getDisplaySize(File self) {
 		return FileUtilities.formatSize(self.length());
 	}