diff --git a/include/hsakmttypes.h b/include/hsakmttypes.h
index 5b4eeba1e1..75fbcb7a58 100644
--- a/include/hsakmttypes.h
+++ b/include/hsakmttypes.h
@@ -469,6 +469,36 @@ typedef struct _HsaMemFlags
     };
 } HsaMemFlags;
 
+typedef struct _HsaMemMapFlags
+{
+    union
+    {
+        struct
+        {
+            unsigned int Reserved1      :  1; //
+            unsigned int CachePolicy    :  4; // see HSA_CACHING_TYPE
+            unsigned int ReadOnly       :  1; // memory is not modified while mapped
+            	    	    	    	      // allows migration scale-out
+	    unsigned int PageSize	    :  2; // see HSA_PAGE_SIZE, hint to use
+					  // this page size if possible and
+					  // smaller than default
+	    unsigned int HostAccess     :  1; // default = 0: GPU access only
+	    unsigned int Migrate        :  1; // Hint: Allows migration to local mem
+						  // of mapped GPU(s), instead of mapping
+						  // physical location
+            unsigned int Probe          :  1;     // default = 0: Indicates that a range
+                                                  // will be mapped by the process soon,
+						  // but does not initiate a map operation
+						  // may trigger eviction of nonessential
+						  // data from the memory, reduces latency
+						  // “cleanup hint” only, may be ignored
+            unsigned int Reserved       : 21;
+        };
+        HSAuint32 Value;
+    };
+} HsaMemMapFlags;
+
+
 typedef enum _HSA_CACHING_TYPE
 {
     HSA_CACHING_CACHED        = 0,