diff --git a/src/drivers/net/3c509.c b/src/drivers/net/3c509.c
index 12cf7740..e704cfca 100644
--- a/src/drivers/net/3c509.c
+++ b/src/drivers/net/3c509.c
@@ -7,6 +7,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
+#include <errno.h>
 #include <io.h>
 #include <timer.h>
 #include <gpxe/device.h>
diff --git a/src/drivers/net/bnx2.c b/src/drivers/net/bnx2.c
index 8d4b0176..105e9c3f 100644
--- a/src/drivers/net/bnx2.c
+++ b/src/drivers/net/bnx2.c
@@ -15,6 +15,7 @@
 
 #include "etherboot.h"
 #include "nic.h"
+#include <errno.h>
 #include <gpxe/pci.h>
 #include <gpxe/ethernet.h>
 #include "timer.h"
diff --git a/src/drivers/net/cs89x0.c b/src/drivers/net/cs89x0.c
index ecb632f9..ce1eef5d 100644
--- a/src/drivers/net/cs89x0.c
+++ b/src/drivers/net/cs89x0.c
@@ -66,6 +66,7 @@
 
   */
 
+#include <errno.h>
 #include <gpxe/ethernet.h>
 #include "etherboot.h"
 #include "nic.h"
diff --git a/src/drivers/net/eepro.c b/src/drivers/net/eepro.c
index 2ea4b000..4d5a798e 100644
--- a/src/drivers/net/eepro.c
+++ b/src/drivers/net/eepro.c
@@ -32,6 +32,7 @@ has 34 pins, the top row of 2 are not used.
  */
 
 #include "etherboot.h"
+#include <errno.h>
 #include "nic.h"
 #include <gpxe/isa.h>
 #include "timer.h"
diff --git a/src/drivers/net/smc9000.c b/src/drivers/net/smc9000.c
index c7893e6f..a623b77e 100644
--- a/src/drivers/net/smc9000.c
+++ b/src/drivers/net/smc9000.c
@@ -36,6 +36,7 @@
 #endif
 
 #include <gpxe/ethernet.h>
+#include <errno.h>
 #include "etherboot.h"
 #include "nic.h"
 #include <gpxe/isa.h>
diff --git a/src/drivers/net/tg3.c b/src/drivers/net/tg3.c
index b59e848a..1b4d793b 100644
--- a/src/drivers/net/tg3.c
+++ b/src/drivers/net/tg3.c
@@ -14,6 +14,7 @@
 
 #include "etherboot.h"
 #include "nic.h"
+#include <errno.h>
 #include <gpxe/pci.h>
 #include <gpxe/ethernet.h>
 #include "timer.h"
diff --git a/src/include/nic.h b/src/include/nic.h
index 0f482252..9d8efd8a 100644
--- a/src/include/nic.h
+++ b/src/include/nic.h
@@ -11,7 +11,6 @@
 #include <stdint.h>
 #include <string.h>
 #include <stdio.h>
-#include <errno.h>
 #include <byteswap.h>
 #include <gpxe/pci.h>
 #include <gpxe/isapnp.h>