diff --git a/dragonmint_t1.c "b/dragonmint_t1.c"
index 9241073..44cd096 100644
--- a/dragonmint_t1.c
+++ "b/dragonmint_t1.c"
@@ -11,7 +11,7 @@
 #include <assert.h>
 #include <fcntl.h>
 #include <limits.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
 #include <stdbool.h>
 
 #include "logging.h"
diff --git a/driver-avalon.c "b/driver-avalon.c"
index 2210130..4ed159b 100644
--- a/driver-avalon.c
+++ "b/driver-avalon.c"
@@ -19,7 +19,7 @@
 #include <sys/types.h>
 #include <ctype.h>
 #include <dirent.h>
-#include <unistd.h>
+//#include <unistd.h> //mod openwrt//
 #include <time.h>
 #ifndef WIN32
   #include <sys/select.h>
diff --git a/diver-avalon2.c "b/driver-avalon2.c"
index c3fa18a..738a775 100644
--- a/driver-avalon2.c
+++ "b/driver-avalon2.c"
@@ -18,7 +18,7 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <dirent.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt/mod
 #ifndef WIN32
   #include <termios.h>
   #include <sys/stat.h>
diff --git a/driver-bflsc.c "b/driver-bflsc.c"
index ce17555..50be2f5 100644
--- a/driver-bflsc.c
+++ "b/driver-bflsc.c"
@@ -18,7 +18,7 @@
 #include <string.h>
 #include <strings.h>
 #include <sys/time.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
 
 #include "compat.h"
 #include "miner.h"
diff --git a/driver-bitforce.c "b/driver-bitforce.c"
index e8a912b..cb91173 100644
--- a/driver-bitforce.c
+++ "b/driver-bitforce.c"
@@ -17,7 +17,7 @@
 #include <stdio.h>
 #include <strings.h>
 #include <sys/time.h>
-#include <unistd.h>
+//#include <unistd.h> // openwrt mod//
 
 #include "compat.h"
 #include "miner.h"
diff --git a/driver-blockerupter.c "b/driver-blockerupter.c"
index 734dd14..c3c2a27 100644
--- a/driver-blockerupter.c
+++ "b/driver-blockerupter.c"
@@ -5,7 +5,7 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <dirent.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
 #include <math.h>
 #ifndef WIN32
 #include <termios.h>
diff --git a/driver-btm-soc.c "b/driver-btm-soc.c"
index 3d439b4..7c22ddc 100644
--- a/driver-btm-soc.c
+++ "b/driver-btm-soc.c"
@@ -16,7 +16,8 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <dirent.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
+
 #include <sys/mman.h>
 #include <math.h>
 
diff --git a/driver-gekko.c "b/driver-gekko.c"
index c41a081..478284f 100644
--- a/driver-gekko.c
+++ "b/driver-gekko.c"
@@ -12,7 +12,7 @@
 #include "driver-gekko.h"
 #include "crc.h"
 #include "compat.h"
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
 
 #ifdef __GNUC__
 #if __GNUC__ >= 7
diff --git a/driver-icarus.c "b/driver-icarus.c"
index 0a20c63..d295239 100644
--- a/driver-icarus.c
+++ "b/driver-icarus.c"
@@ -37,7 +37,7 @@
 #include <stdio.h>
 #include <strings.h>
 #include <sys/time.h>
-#include <unistd.h>
+//#include <unistd.h> // openwrt mod //
 #include <math.h>
 
 #include "config.h"
diff --git a/driver-klondike.c "b/driver-klondike.c"
index 61981d8..648e1e6 100644
--- a/driver-klondike.c
+++ "b/driver-klondike.c"
@@ -16,7 +16,7 @@
 #include <stdio.h>
 #include <strings.h>
 #include <sys/time.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
 #include <math.h>
 
 #include "config.h"
diff --git a/driver-knc.c "b/driver-knc.c"
index 564d27d..34d1989 100644
--- a/driver-knc.c
+++ "b/driver-knc.c"
@@ -13,7 +13,7 @@
 #include <assert.h>
 #include <fcntl.h>
 #include <limits.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
 #include <sys/ioctl.h>
 #include <sys/time.h>
 #include <linux/types.h>
diff --git a/driver-modminer.c "b/driver-modminer.c"
index d3dd946..8094246 100644
--- a/driver-modminer.c
+++ "b/driver-modminer.c"
@@ -12,7 +12,7 @@
 
 #include <stdarg.h>
 #include <stdio.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
 #include <math.h>
 
 #include "logging.h"
diff --git a/driver-spondoolies-sp10.c "b/driver-spondoolies-sp10.c"
index c2a983a..9a0f115 100644
--- a/driver-spondoolies-sp10.c
+++ "b/driver-spondoolies-sp10.c"
@@ -23,7 +23,7 @@
 #include <stdio.h>
 #include <strings.h>
 #include <sys/time.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
 #include <assert.h>
 #include <time.h>
 #include <sys/socket.h>
diff --git a/driver-spondoolies-sp30.c "b/driver-spondoolies-sp30.c"
index 1a71d12..b0bdb25 100644
--- a/driver-spondoolies-sp30.c
+++ "b/driver-spondoolies-sp30.c"
@@ -23,7 +23,7 @@
 #include <stdio.h>
 #include <strings.h>
 #include <sys/time.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
 #include <assert.h>
 #include <time.h>
 #include <sys/socket.h>
diff --git a/usbutils.c "b/usbutils.c"
index d6c9ad6..ff3ad1e 100644
--- a/usbutils.c
+++ "b/usbutils.c"
@@ -4112,7 +4112,7 @@ void usb_initialise(void)
 
 #ifndef WIN32
 #include <errno.h>
-#include <unistd.h>
+//#include <unistd.h> //openwrt mod//
 #include <sys/stat.h>
 #include <sys/file.h>
 #include <fcntl.h>