diff --git a/core/src/main/java/com/opensymphony/xwork2/security/DefaultAcceptedPatternsChecker.java b/core/src/main/java/com/opensymphony/xwork2/security/DefaultAcceptedPatternsChecker.java
index f360cc78a..62721161d 100644
--- a/core/src/main/java/com/opensymphony/xwork2/security/DefaultAcceptedPatternsChecker.java
+++ b/core/src/main/java/com/opensymphony/xwork2/security/DefaultAcceptedPatternsChecker.java
@@ -37,11 +37,11 @@ public class DefaultAcceptedPatternsChecker implements AcceptedPatternsChecker {
     private static final Logger LOG = LogManager.getLogger(DefaultAcceptedPatternsChecker.class);
 
     public static final String[] ACCEPTED_PATTERNS = {
-            "\\w+((\\.\\w+)|(\\[\\d+\\])|(\\(\\d+\\))|(\\['(\\w|[\\u4e00-\\u9fa5])+'\\])|(\\('(\\w|[\\u4e00-\\u9fa5])+'\\)))*"
+            "\\w+((\\.\\w+)|(\\[\\d+])|(\\(\\d+\\))|(\\['(\\w|[\\u4e00-\\u9fa5])+'])|(\\('(\\w|[\\u4e00-\\u9fa5])+'\\)))*"
     };
 
     public static final String[] DMI_AWARE_ACCEPTED_PATTERNS = {
-            "\\w+([:]?\\w+)*((\\.\\w+)|(\\[\\d+\\])|(\\(\\d+\\))|(\\['(\\w|[\\u4e00-\\u9fa5])+'\\])|(\\('(\\w|[\\u4e00-\\u9fa5])+'\\)))*([!]?\\w+)*"
+            "\\w+([:]?\\w+)?((\\.\\w+)|(\\[\\d+])|(\\(\\d+\\))|(\\['(\\w|[\\u4e00-\\u9fa5])+'])|(\\('(\\w|[\\u4e00-\\u9fa5])+'\\)))*([!]?\\w+)?"
     };
 
     private Set<Pattern> acceptedPatterns;