diff --git a/rigs/flexradio/smartsdr.c b/rigs/flexradio/smartsdr.c
index dac05d1db..648133f1f 100644
--- a/rigs/flexradio/smartsdr.c
+++ b/rigs/flexradio/smartsdr.c
@@ -23,7 +23,6 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <math.h>
-#include <errno.h>
 
 #include "hamlib/rig.h"
 #include "parallel.h"
diff --git a/rigs/kit/dwt.c b/rigs/kit/dwt.c
index 9fa056cc2..1663db73a 100644
--- a/rigs/kit/dwt.c
+++ b/rigs/kit/dwt.c
@@ -505,7 +505,6 @@ static const char *dwtdll_get_info(RIG *rig)
 
 #elif defined(HAVE_LIBUSB) && (defined(HAVE_LIBUSB_H) || defined(HAVE_LIBUSB_1_0_LIBUSB_H))
 
-#include <errno.h>
 
 #ifdef HAVE_LIBUSB_H
 # include <libusb.h>
diff --git a/rigs/kit/elektor507.c b/rigs/kit/elektor507.c
index 086741a94..720e746ee 100644
--- a/rigs/kit/elektor507.c
+++ b/rigs/kit/elektor507.c
@@ -148,7 +148,6 @@ struct elektor507_extra_priv_data
 #elif defined(USE_LIBUSB)
 
 
-#include <errno.h>
 
 #ifdef HAVE_LIBUSB_H
 # include <libusb.h>
diff --git a/rigs/kit/fifisdr.c b/rigs/kit/fifisdr.c
index 74875e5e3..dbf4d564d 100644
--- a/rigs/kit/fifisdr.c
+++ b/rigs/kit/fifisdr.c
@@ -39,7 +39,6 @@
  */
 #if defined(HAVE_LIBUSB) && (defined(HAVE_LIBUSB_H) || defined(HAVE_LIBUSB_1_0_LIBUSB_H))
 
-#include <errno.h>
 
 #ifdef HAVE_LIBUSB_H
 # include <libusb.h>
diff --git a/rigs/kit/funcube.c b/rigs/kit/funcube.c
index 8020cb381..2310bf6fa 100644
--- a/rigs/kit/funcube.c
+++ b/rigs/kit/funcube.c
@@ -37,7 +37,6 @@
  */
 #if defined(HAVE_LIBUSB) && (defined(HAVE_LIBUSB_H) || defined(HAVE_LIBUSB_1_0_LIBUSB_H))
 
-#include <errno.h>
 
 #ifdef HAVE_LIBUSB_H
 # include <libusb.h>
diff --git a/rigs/kit/si570avrusb.c b/rigs/kit/si570avrusb.c
index edaba663f..048a70147 100644
--- a/rigs/kit/si570avrusb.c
+++ b/rigs/kit/si570avrusb.c
@@ -41,7 +41,6 @@
  */
 #if defined(HAVE_LIBUSB) && (defined(HAVE_LIBUSB_H) || defined(HAVE_LIBUSB_1_0_LIBUSB_H))
 
-#include <errno.h>
 
 #ifdef HAVE_LIBUSB_H
 # include <libusb.h>
diff --git a/src/sleep.c b/src/sleep.c
index 00a29e2d0..1155065af 100644
--- a/src/sleep.c
+++ b/src/sleep.c
@@ -36,7 +36,6 @@
  *
  */
 #include <unistd.h>
-#include <errno.h>
 #include <pthread.h>
 #include "hamlib/config.h"
 #include "sleep.h"