2 files changed, 2 insertions, 0 deletions
diff --git a/libc/misc/regex/regex.c b/libc/misc/regex/regex.c
index 0eefa85c9..5220ba57c 100644
--- a/libc/misc/regex/regex.c
+++ b/libc/misc/regex/regex.c
@@ -33,6 +33,7 @@
 #ifdef __UCLIBC_HAS_WCHAR__
 #define RE_ENABLE_I18N
 #define wcscoll __wcscoll
+#define wcrtomb __wcrtomb
 #define mbrtowc __mbrtowc
 #define iswctype __iswctype
 #define iswlower __iswlower
diff --git a/libc/misc/regex/regex_old.c b/libc/misc/regex/regex_old.c
index ab471ee1e..1f9d37780 100644
--- a/libc/misc/regex/regex_old.c
+++ b/libc/misc/regex/regex_old.c
@@ -29,6 +29,7 @@
 /* for some reason this does not work */
 #define memcpy __memcpy
 #define mbrtowc __mbrtowc
+#define wcrtomb __wcrtomb
 #define wcscoll __wcscoll
 #define iswctype __iswctype
 #define iswalnum __iswalnum