diff --git a/src/main/java/com/box/sdk/http/HttpHeaders.java b/src/main/java/com/box/sdk/http/HttpHeaders.java
index <HASH>..<HASH> 100644
--- a/src/main/java/com/box/sdk/http/HttpHeaders.java
+++ b/src/main/java/com/box/sdk/http/HttpHeaders.java
@@ -9,6 +9,8 @@ public final class HttpHeaders {
     public static final String CONTENT_RANGE = "Content-Range";
     public static final String CONTENT_TYPE = "Content-Type";
     public static final String DIGEST = "Digest";
+    public static final String IF_MATCH = "If-Match";
+    public static final String IF_NONE_MATCH = "If-None-Match";
     public static final String X_BOX_PART_ID = "X-Box-Part-Id";
 
     //Prevents instantiation
If-Match and If-None-Match headers implementation