diff --git a/src/main/java/es/uvigo/esei/daa/LoginFilter.java b/src/main/java/es/uvigo/esei/daa/LoginFilter.java
index 22ba558f700fba28f8a5429324f77981f428702a..b62919bcd467a8de06e602206686c5f3425cef3a 100644
--- a/src/main/java/es/uvigo/esei/daa/LoginFilter.java
+++ b/src/main/java/es/uvigo/esei/daa/LoginFilter.java
@@ -101,7 +101,7 @@ public class LoginFilter implements Filter {
 	) throws IOException {
 		String redirectPath = request.getRequestURI();
 		if (request.getQueryString() != null)
-			redirectPath += request.getQueryString();
+			redirectPath += "?" + request.getQueryString();
 		
 		response.sendRedirect(redirectPath);
 	}