diff --git a/src/librnode.c b/src/librnode.c
index 02836a8..7a8b0e4 100755
--- a/src/librnode.c
+++ b/src/librnode.c
@@ -534,8 +534,8 @@ int rnode_get_interfaces(struct RNode* rn) {
     uint8_t cmd_buf_l = 0;
     uint16_t frame_len = 0;
 
-    memcpy(tx_buf, (uint8_t[3]){FEND, CMD_INTERFACES, FEND}, 3*sizeof(uint8_t));
-    err_code = write_port(rn->fd, tx_buf, 3);
+    memcpy(tx_buf, (uint8_t[4]){FEND, CMD_INTERFACES, 0x00, FEND}, 4*sizeof(uint8_t));
+    err_code = write_port(rn->fd, tx_buf, 4);
     
     if (!err_code) {
         sleep_ms(100);
diff --git a/src/libs/framing.h b/src/libs/framing.h
index fcc07ef..89f53c5 100644
--- a/src/libs/framing.h
+++ b/src/libs/framing.h
@@ -85,7 +85,7 @@
   #define CMD_RESET       0x55
   #define CMD_RESET_BYTE  0xF8
 
-  #define CMD_INTERFACES  0x64
+  #define CMD_INTERFACES  0x71
   #define CMD_SEL_INT     0x1F
 
   #define DETECT_REQ      0x73