diff --git a/modules/org.jkiss.utils/src/main/java/org/jkiss/utils/HttpConstants.java b/modules/org.jkiss.utils/src/main/java/org/jkiss/utils/HttpConstants.java
index 80752d4..8d87d58 100644
--- a/modules/org.jkiss.utils/src/main/java/org/jkiss/utils/HttpConstants.java
+++ b/modules/org.jkiss.utils/src/main/java/org/jkiss/utils/HttpConstants.java
@@ -19,6 +19,7 @@
 public class HttpConstants {
     public static final String HEADER_USER_AGENT = "User-Agent";
 
+    public static final String HEADER_ACCEPT = "Accept";
     public static final String HEADER_X_REFERRER = "X-Referrer";
     public static final String HEADER_CONTENT_TYPE = "Content-Type";
     public static final String HEADER_AUTHORIZATION = "Authorization";