diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 2cc04abb6df8..2043e1a8f851 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -860,6 +860,19 @@ enum ib_sig_err_type {
 	IB_SIG_BAD_APPTAG,
 };
 
+/**
+ * Signature check masks (8 bytes in total) according to the T10-PI standard:
+ *  -------- -------- ------------
+ * | GUARD  | APPTAG |   REFTAG   |
+ * |  2B    |  2B    |    4B      |
+ *  -------- -------- ------------
+ */
+enum {
+	IB_SIG_CHECK_GUARD	= 0xc0,
+	IB_SIG_CHECK_APPTAG	= 0x30,
+	IB_SIG_CHECK_REFTAG	= 0x0f,
+};
+
 /**
  * struct ib_sig_err - signature error descriptor
  */