diff --git a/main/ast_expr2.c b/main/ast_expr2.c
index b7b45dae9c..5b8f6e8b78 100644
--- a/main/ast_expr2.c
+++ b/main/ast_expr2.c
@@ -94,7 +94,6 @@
 #define ASTMM_LIBC ASTMM_REDIRECT
 #include "asterisk.h"
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
 #include <stdio.h>
 
diff --git a/main/ast_expr2.y b/main/ast_expr2.y
index 144df571f4..b0b257d66a 100644
--- a/main/ast_expr2.y
+++ b/main/ast_expr2.y
@@ -15,7 +15,6 @@
 #define ASTMM_LIBC ASTMM_REDIRECT
 #include "asterisk.h"
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
 #include <stdio.h>
 
diff --git a/utils/db1-ast/include/db.h b/utils/db1-ast/include/db.h
index 23b9b9575c..30f73e2d4e 100644
--- a/utils/db1-ast/include/db.h
+++ b/utils/db1-ast/include/db.h
@@ -37,7 +37,6 @@
 #define	_DB_H 1
 
 #include <sys/types.h>
-#include <sys/cdefs.h>
 
 #include <limits.h>