diff --git a/nimble/host/src/ble_sm_sc.c b/nimble/host/src/ble_sm_sc.c
index abd342d6c..d94901b97 100644
--- a/nimble/host/src/ble_sm_sc.c
+++ b/nimble/host/src/ble_sm_sc.c
@@ -569,9 +569,9 @@ ble_sm_sc_public_key_rx(uint16_t conn_handle, struct os_mbuf **om,
 
     cmd = (struct ble_sm_public_key *)(*om)->om_data;
     BLE_SM_LOG_CMD(0, "public key", conn_handle, ble_sm_public_key_log, cmd);
-    /* Check if the peer public key is same as our generated public key.
-     * Return fail if the public keys match. */
-    if (memcmp(cmd, ble_sm_sc_pub_key, 64) == 0) {
+    /* Check if the X component of peer public key is same as X component of our generated public key.
+     * Return fail if they match. */
+    if (memcmp(cmd, ble_sm_sc_pub_key, 32) == 0) {
         res->enc_cb = 1;
         res->sm_err = BLE_SM_ERR_AUTHREQ;
         return;