diff --git a/web/src/main/java/org/springframework/security/web/authentication/www/BasicAuthenticationFilter.java b/web/src/main/java/org/springframework/security/web/authentication/www/BasicAuthenticationFilter.java
index e5fc91940c..853e99874c 100644
--- a/web/src/main/java/org/springframework/security/web/authentication/www/BasicAuthenticationFilter.java
+++ b/web/src/main/java/org/springframework/security/web/authentication/www/BasicAuthenticationFilter.java
@@ -183,7 +183,7 @@ public class BasicAuthenticationFilter extends OncePerRequestFilter {
 			SecurityContextHolder.clearContext();
 
 			if (debug) {
-				this.logger.debug("Authentication request for failed: " + failed);
+				this.logger.debug("Authentication request for failed!", failed);
 			}
 
 			this.rememberMeServices.loginFail(request, response);