diff --git a/libc/minilibc/string.c b/libc/minilibc/string.c
index 179cd07b88533b6512e37624b03a0a178f7e0522..52726f2cbfa5723a4fa47e5144b3d75a23e6aaba 100644
--- a/libc/minilibc/string.c
+++ b/libc/minilibc/string.c
@@ -564,6 +564,21 @@ size_t strspn(const char *s, const char *accept)
 	return l;
 }
 
+size_t strcspn(const char *s, const char *reject)
+{
+	size_t l=0;
+	int a=1,i,al=strlen(reject);
+
+	while((a)&&(*s))
+	{
+		for(i=0;(a)&&(i<al);i++)
+			if (*s==reject[i]) a=0;
+		if (a) l++;
+		s++;
+	}
+	return l;
+}
+
 char*strtok_r(char*s,const char*delim,char**ptrptr)
 {
 	char*tmp=0;
diff --git a/libc/minilibc/string.h b/libc/minilibc/string.h
index 19b1cbfc07a1530ed666537733d410703b207e14..f9cc9a659116a4672411d8996fd26b438c803a0d 100644
--- a/libc/minilibc/string.h
+++ b/libc/minilibc/string.h
@@ -70,6 +70,9 @@ char *strdup(const char *s);
 char *strtok(char *s, const char *delim);
 char*strtok_r(char*s, const char*delim, char**ptrptr);
 
+size_t strcspn(const char *s, const char *reject);
+size_t strspn (const char *s, const char *accept);
+
 #endif
 
 #endif