diff --git a/ulib/axlibc/c/printf.h b/ulib/axlibc/c/printf.h
index a17562f227..c6484e504a 100644
--- a/ulib/axlibc/c/printf.h
+++ b/ulib/axlibc/c/printf.h
@@ -42,7 +42,7 @@
 #ifdef __cplusplus
 #include <cstdarg>
 #include <cstddef>
-unsafe extern "C" {
+extern "C" {
 #else
 #include <stdarg.h>
 #include <stddef.h>
diff --git a/ulib/axlibc/include/dlfcn.h b/ulib/axlibc/include/dlfcn.h
index 50b0cdaae8..a1caea91e8 100644
--- a/ulib/axlibc/include/dlfcn.h
+++ b/ulib/axlibc/include/dlfcn.h
@@ -2,7 +2,7 @@
 #define _DLFCN_H
 
 #ifdef __cplusplus
-unsafe extern "C" {
+extern "C" {
 #endif
 
 #include <features.h>
diff --git a/ulib/axlibc/include/fnmatch.h b/ulib/axlibc/include/fnmatch.h
index eee053fac6..c387c5ce70 100644
--- a/ulib/axlibc/include/fnmatch.h
+++ b/ulib/axlibc/include/fnmatch.h
@@ -2,7 +2,7 @@
 #define _FNMATCH_H
 
 #ifdef __cplusplus
-unsafe extern "C" {
+extern "C" {
 #endif
 
 #define FNM_PATHNAME    0x1
diff --git a/ulib/axlibc/include/libgen.h b/ulib/axlibc/include/libgen.h
index c0b7552427..7c7fd9c6d2 100644
--- a/ulib/axlibc/include/libgen.h
+++ b/ulib/axlibc/include/libgen.h
@@ -2,7 +2,7 @@
 #define _LIBGEN_H
 
 #ifdef __cplusplus
-unsafe extern "C" {
+extern "C" {
 #endif
 
 char *dirname(char *);
diff --git a/ulib/axlibc/include/sys/epoll.h b/ulib/axlibc/include/sys/epoll.h
index f5a383e5ee..bd23bcf46b 100644
--- a/ulib/axlibc/include/sys/epoll.h
+++ b/ulib/axlibc/include/sys/epoll.h
@@ -2,7 +2,7 @@
 #define _SYS_EPOLL_H
 
 #ifdef __cplusplus
-unsafe extern "C" {
+extern "C" {
 #endif
 
 #include <fcntl.h>
diff --git a/ulib/axlibc/include/sys/file.h b/ulib/axlibc/include/sys/file.h
index 11200e7e4a..d5e15a67f7 100644
--- a/ulib/axlibc/include/sys/file.h
+++ b/ulib/axlibc/include/sys/file.h
@@ -2,7 +2,7 @@
 #define _SYS_FILE_H
 
 #ifdef __cplusplus
-unsafe extern "C" {
+extern "C" {
 #endif
 
 #define LOCK_SH 1
diff --git a/ulib/axlibc/include/sys/utsname.h b/ulib/axlibc/include/sys/utsname.h
index 79328e5252..fa708a1294 100644
--- a/ulib/axlibc/include/sys/utsname.h
+++ b/ulib/axlibc/include/sys/utsname.h
@@ -2,7 +2,7 @@
 #define _SYS_UTSNAME_H
 
 #ifdef __cplusplus
-unsafe extern "C" {
+extern "C" {
 #endif
 
 struct utsname {