diff --git a/libc/include/string.h b/libc/include/string.h
index b9c386cb1..46946a364 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -20,6 +20,7 @@ char*	stpcpy(char* __restrict s1, const char* __restrict s2);
 char*	stpncpy(char* __restrict s1, const char* __restrict s2, size_t n);
 char*	strcat(char* __restrict s1, const char* __restrict s2);
 char*	strchr(const char* s, int c);
+char*	strchrnul(const char* s, int c);
 int		strcmp(const char* s1, const char* s2);
 int		strcoll(const char* s1, const char* s2);
 int		strcoll_l(const char* s1, const char* s2, locale_t locale);
diff --git a/libc/string.cpp b/libc/string.cpp
index 4b20be845..c85a000f9 100644
--- a/libc/string.cpp
+++ b/libc/string.cpp
@@ -303,6 +303,17 @@ char* strchr(const char* str, int c)
 	return (*str == c) ? (char*)str : nullptr;
 }
 
+char* strchrnul(const char* str, int c)
+{
+	while (*str)
+	{
+		if (*str == c)
+			return (char*)str;
+		str++;
+	}
+	return (char*)str;
+}
+
 char* strncpy(char* __restrict__ dest, const char* __restrict__ src, size_t n)
 {
 	size_t i;