1 files changed, 6 insertions, 2 deletions
diff --git a/lib/libc/ctype/isalpha.c b/lib/libc/ctype/isalpha.c
index a1b89762..6727d22a 100644
--- a/lib/libc/ctype/isalpha.c
+++ b/lib/libc/ctype/isalpha.c
@@ -1,8 +1,12 @@
-#include <libc.h> // for weak_reference
+#include <ctype.h>     // for isalpha, isalpha_l, locale_t
+#include <sys/cdefs.h> // for __unused, __weak
 
 int isalpha(int c)
 {
 	return ((unsigned)c | 32) - 'a' < 26;
 }
 
-weak_reference(isalpha, isalpha_l);
+__weak int isalpha_l(int c, locale_t __unused locale)
+{
+	return isalpha(c);
+}