diff --git a/bin/named/fuzz.c b/bin/named/fuzz.c
index 5907877c2d..47b15f5d5c 100644
--- a/bin/named/fuzz.c
+++ b/bin/named/fuzz.c
@@ -19,7 +19,7 @@
 #ifdef ENABLE_AFL
 #include <named/globals.h>
 #include <named/server.h>
-#include <sys/errno.h>
+#include <errno.h>
 
 #include <isc/app.h>
 #include <isc/condition.h>
diff --git a/contrib/dlz/modules/common/dlz_dbi.c b/contrib/dlz/modules/common/dlz_dbi.c
index 566e10b2ba..7b4c9da5f0 100644
--- a/contrib/dlz/modules/common/dlz_dbi.c
+++ b/contrib/dlz/modules/common/dlz_dbi.c
@@ -41,6 +41,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
+#include <errno.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <string.h>
@@ -48,8 +49,6 @@
 #include <stdlib.h>
 #include <ctype.h>
 
-#include <sys/errno.h>
-
 #include <dlz_minimal.h>
 #include <dlz_list.h>
 #include <dlz_dbi.h>
diff --git a/lib/isc/tests/errno_test.c b/lib/isc/tests/errno_test.c
index c4f8beb48f..39a1f01ec0 100644
--- a/lib/isc/tests/errno_test.c
+++ b/lib/isc/tests/errno_test.c
@@ -17,11 +17,10 @@
 #include <stddef.h>
 #include <setjmp.h>
 
+#include <errno.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include <sys/errno.h>
-
 #define UNIT_TESTING
 #include <cmocka.h>