diff --git a/sys/kern/imgact_elf32.c b/sys/kern/imgact_elf32.c
index f74b0d31c9d..b3e8edb28b3 100644
--- a/sys/kern/imgact_elf32.c
+++ b/sys/kern/imgact_elf32.c
@@ -26,6 +26,5 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/cdefs.h>
 #define __ELF_WORD_SIZE 32
 #include <kern/imgact_elf.c>
diff --git a/sys/kern/imgact_elf64.c b/sys/kern/imgact_elf64.c
index bd198bae4fe..b903755779a 100644
--- a/sys/kern/imgact_elf64.c
+++ b/sys/kern/imgact_elf64.c
@@ -26,6 +26,5 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/cdefs.h>
 #define __ELF_WORD_SIZE 64
 #include <kern/imgact_elf.c>
diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c
index 96980b869f9..3df4b1edf4a 100644
--- a/sys/kern/init_main.c
+++ b/sys/kern/init_main.c
@@ -41,7 +41,6 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/cdefs.h>
 #include "opt_ddb.h"
 #include "opt_kdb.h"
 #include "opt_init_path.h"
diff --git a/sys/kern/link_elf.c b/sys/kern/link_elf.c
index eb7ce3828de..4c7af262add 100644
--- a/sys/kern/link_elf.c
+++ b/sys/kern/link_elf.c
@@ -26,7 +26,6 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/cdefs.h>
 #include "opt_ddb.h"
 #include "opt_gdb.h"
 
diff --git a/sys/kern/link_elf_obj.c b/sys/kern/link_elf_obj.c
index 0b2befc02c1..1001cb53ba4 100644
--- a/sys/kern/link_elf_obj.c
+++ b/sys/kern/link_elf_obj.c
@@ -27,7 +27,6 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/cdefs.h>
 #include "opt_ddb.h"
 
 #include <sys/param.h>