diff --git a/src/locale/duplocale.c b/src/locale/duplocale.c
index 5f01e13..716df4a 100644
--- a/src/locale/duplocale.c
+++ b/src/locale/duplocale.c
@@ -1,11 +1,14 @@
 #include <stdlib.h>
 #include <string.h>
 #include "locale_impl.h"
+#include "libc.h"
 
-locale_t duplocale(locale_t old)
+locale_t __duplocale(locale_t old)
 {
 	locale_t new;
 	new = calloc(1, sizeof *new);
 	if (new && old != LC_GLOBAL_LOCALE) memcpy(new, old, sizeof *new);
 	return new;
 }
+
+weak_alias(__duplocale, duplocale);
diff --git a/src/locale/freelocale.c b/src/locale/freelocale.c
index 4e089f2..f35ac46 100644
--- a/src/locale/freelocale.c
+++ b/src/locale/freelocale.c
@@ -1,7 +1,10 @@
 #include <stdlib.h>
 #include "locale_impl.h"
+#include "libc.h"
 
-void freelocale(locale_t l)
+void __freelocale(locale_t l)
 {
 	free(l);
 }
+
+weak_alias(__freelocale, freelocale);
diff --git a/src/locale/iswctype_l.c b/src/locale/iswctype_l.c
index 1dccef6..c20ef6a 100644
--- a/src/locale/iswctype_l.c
+++ b/src/locale/iswctype_l.c
@@ -1,6 +1,9 @@
 #include <wctype.h>
+#include "libc.h"
 
-int iswctype_l(wint_t c, wctype_t t, locale_t l)
+int __iswctype_l(wint_t c, wctype_t t, locale_t l)
 {
 	return iswctype(c, t);
 }
+
+weak_alias(__iswctype_l, iswctype_l);
diff --git a/src/locale/newlocale.c b/src/locale/newlocale.c
index 986e796..447c8fc 100644
--- a/src/locale/newlocale.c
+++ b/src/locale/newlocale.c
@@ -1,6 +1,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "locale_impl.h"
+#include "libc.h"
 
 locale_t newlocale(int mask, const char *name, locale_t base)
 {
@@ -9,3 +10,5 @@ locale_t newlocale(int mask, const char *name, locale_t base)
 	if (!base) base = calloc(1, sizeof *base);
 	return base;
 }
+
+weak_alias(newlocale, __newlocale);
diff --git a/src/locale/nl_langinfo_l.c b/src/locale/nl_langinfo_l.c
index b54db95..3227d63 100644
--- a/src/locale/nl_langinfo_l.c
+++ b/src/locale/nl_langinfo_l.c
@@ -1,7 +1,10 @@
 #include <locale.h>
 #include <langinfo.h>
+#include "libc.h"
 
-char *nl_langinfo_l(nl_item item, locale_t l)
+char *__nl_langinfo_l(nl_item item, locale_t l)
 {
 	return nl_langinfo(item);
 }
+
+weak_alias(__nl_langinfo_l, nl_langinfo_l);
diff --git a/src/locale/strcoll_l.c b/src/locale/strcoll_l.c
index 7948b0d..2b096db 100644
--- a/src/locale/strcoll_l.c
+++ b/src/locale/strcoll_l.c
@@ -1,7 +1,10 @@
 #include <string.h>
 #include <locale.h>
+#include "libc.h"
 
-int strcoll_l(const char *l, const char *r, locale_t loc)
+int __strcoll_l(const char *l, const char *r, locale_t loc)
 {
 	return strcoll(l, r);
 }
+
+weak_alias(__strcoll_l, strcoll_l);
diff --git a/src/locale/strftime_l.c b/src/locale/strftime_l.c
index 70b2f15..edda89d 100644
--- a/src/locale/strftime_l.c
+++ b/src/locale/strftime_l.c
@@ -1,7 +1,10 @@
 #include <locale.h>
 #include <time.h>
+#include "libc.h"
 
-size_t strftime_l(char *s, size_t n, const char *f, const struct tm *tm, locale_t l)
+size_t __strftime_l(char *s, size_t n, const char *f, const struct tm *tm, locale_t l)
 {
 	return strftime(s, n, f, tm);
 }
+
+weak_alias(__strftime_l, strftime_l);
diff --git a/src/locale/strxfrm_l.c b/src/locale/strxfrm_l.c
index 78e5655..788c350 100644
--- a/src/locale/strxfrm_l.c
+++ b/src/locale/strxfrm_l.c
@@ -1,6 +1,9 @@
 #include <string.h>
+#include "libc.h"
 
-size_t strxfrm_l(char *dest, const char *src, size_t n, locale_t l)
+size_t __strxfrm_l(char *dest, const char *src, size_t n, locale_t l)
 {
 	return strxfrm(dest, src, n);
 }
+
+weak_alias(__strxfrm_l, strxfrm_l);
diff --git a/src/locale/towlower_l.c b/src/locale/towlower_l.c
index 05fcde5..d565316 100644
--- a/src/locale/towlower_l.c
+++ b/src/locale/towlower_l.c
@@ -1,6 +1,9 @@
 #include <wctype.h>
+#include "libc.h"
 
-wint_t towlower_l(wint_t c, locale_t l)
+wint_t __towlower_l(wint_t c, locale_t l)
 {
 	return towlower(c);
 }
+
+weak_alias(__towlower_l, towlower_l);
diff --git a/src/locale/towupper_l.c b/src/locale/towupper_l.c
index aa861ae..f843c4f 100644
--- a/src/locale/towupper_l.c
+++ b/src/locale/towupper_l.c
@@ -1,6 +1,9 @@
 #include <wctype.h>
+#include "libc.h"
 
-wint_t towupper_l(wint_t c, locale_t l)
+wint_t __towupper_l(wint_t c, locale_t l)
 {
 	return towupper(c);
 }
+
+weak_alias(__towupper_l, towupper_l);
diff --git a/src/locale/uselocale.c b/src/locale/uselocale.c
index 9c79957..a1405c5 100644
--- a/src/locale/uselocale.c
+++ b/src/locale/uselocale.c
@@ -1,10 +1,13 @@
 #include "locale_impl.h"
 #include "pthread_impl.h"
+#include "libc.h"
 
-locale_t uselocale(locale_t l)
+locale_t __uselocale(locale_t l)
 {
 	pthread_t self = pthread_self();
 	locale_t old = self->locale;
 	if (l) self->locale = l;
 	return old;
 }
+
+weak_alias(__uselocale, uselocale);
diff --git a/src/locale/wcscoll_l.c b/src/locale/wcscoll_l.c
index f257ec8..bf26372 100644
--- a/src/locale/wcscoll_l.c
+++ b/src/locale/wcscoll_l.c
@@ -1,6 +1,9 @@
 #include <wchar.h>
+#include "libc.h"
 
-int wcscoll_l(const wchar_t *l, const wchar_t *r, locale_t locale)
+int __wcscoll_l(const wchar_t *l, const wchar_t *r, locale_t locale)
 {
 	return wcscoll(l, r);
 }
+
+weak_alias(__wcscoll_l, wcscoll_l);
diff --git a/src/locale/wcsxfrm_l.c b/src/locale/wcsxfrm_l.c
index 831998e..4f47587 100644
--- a/src/locale/wcsxfrm_l.c
+++ b/src/locale/wcsxfrm_l.c
@@ -1,6 +1,9 @@
 #include <wchar.h>
+#include "libc.h"
 
-size_t wcsxfrm_l(wchar_t *dest, const wchar_t *src, size_t n, locale_t locale)
+size_t __wcsxfrm_l(wchar_t *dest, const wchar_t *src, size_t n, locale_t locale)
 {
 	return wcsxfrm(dest, src, n);
 }
+
+weak_alias(__wcsxfrm_l, wcsxfrm_l);
diff --git a/src/locale/wctype_l.c b/src/locale/wctype_l.c
index 01f9c67..d937275 100644
--- a/src/locale/wctype_l.c
+++ b/src/locale/wctype_l.c
@@ -1,6 +1,9 @@
 #include <wctype.h>
+#include "libc.h"
 
-wctype_t wctype_l(const char *s, locale_t l)
+wctype_t __wctype_l(const char *s, locale_t l)
 {
 	return wctype(s);
 }
+
+weak_alias(__wctype_l, wctype_l);