diff --git a/dos/string.h b/dos/string.h
index f648de2..a502132 100644
--- a/dos/string.h
+++ b/dos/string.h
@@ -5,12 +5,13 @@
#ifndef _STRING_H
#define _STRING_H
+#include <stddef.h>
+
/* Standard routines */
#define memcpy(a,b,c) __builtin_memcpy(a,b,c)
#define memmove(a,b,c) __builtin_memmove(a,b,c)
#define memset(a,b,c) __builtin_memset(a,b,c)
#define strcpy(a,b) __builtin_strcpy(a,b)
-#define strlen(a) __builtin_strlen(a)
/* This only returns true or false */
static inline int memcmp(const void *__m1, const void *__m2, unsigned int __n)
@@ -21,6 +22,13 @@ static inline int memcmp(const void *__m1, const void *__m2, unsigned int __n)
return rv;
}
+static inline size_t strlen(const char *s)
+{
+ size_t len = 0;
+ while (*s++) len++;
+ return len;
+}
+
extern char *strchr(const char *s, int c);
#endif /* _STRING_H */