diff --git a/inc/saimacsec.h b/inc/saimacsec.h
index c2e4c736a..83076705a 100644
--- a/inc/saimacsec.h
+++ b/inc/saimacsec.h
@@ -54,6 +54,19 @@ typedef enum _sai_macsec_cipher_suite_t
     SAI_MACSEC_CIPHER_SUITE_GCM_AES_XPN_256
 } sai_macsec_cipher_suite_t;
 
+/**
+ * @brief Max number of secure associations for each secure channel
+ *
+ * An implementation may support either two or four associations
+ * depending on whether it stores the secure association
+ * number in one or two bits.
+ */
+typedef enum _sai_macsec_max_secure_associations_per_sc_t
+{
+    SAI_MACSEC_MAX_SECURE_ASSOCIATIONS_PER_SC_TWO,
+    SAI_MACSEC_MAX_SECURE_ASSOCIATIONS_PER_SC_FOUR,
+} sai_macsec_max_secure_associations_per_sc_t;
+
 /**
  * @brief Attribute Id for sai_macsec
  */
@@ -292,6 +305,14 @@ typedef enum _sai_macsec_attr_t
      */
     SAI_MACSEC_ATTR_AVAILABLE_MACSEC_SA,
 
+    /**
+     * @brief MACsec Secure Associations Limit
+     *
+     * @type sai_macsec_max_secure_associations_per_sc_t
+     * @flags READ_ONLY
+     */
+    SAI_MACSEC_ATTR_MAX_SECURE_ASSOCIATIONS_PER_SC,
+
     /**
      * @brief End of MACsec attributes
      */