diff --git a/include/string.h b/include/string.h
index 10d5b176..4aa930ed 100644
--- a/include/string.h
+++ b/include/string.h
@@ -85,7 +85,7 @@ char *strcasestr(const char *, const char *);
 char *strsep(char **, const char *);
 void *memrchr(const void *, int, size_t);
 void *mempcpy(void *, const void *, size_t);
-char *basename(char *);
+char *basename();
 #endif
 
 #ifdef __cplusplus