diff --git a/ORCACDefs/stdlib.h b/ORCACDefs/stdlib.h
index 2f59d0f..4ff2de6 100644
--- a/ORCACDefs/stdlib.h
+++ b/ORCACDefs/stdlib.h
@@ -66,6 +66,7 @@ long long       llabs(long long);
 lldiv_t         lldiv(long long, long long);
 #endif
 void           *malloc(size_t);
+int             mblen(const char *, size_t);
 void            qsort(void *, size_t, size_t, int (*__compar)(const void *, const void *));
 void            quick_exit(int);
 int             rand(void);
diff --git a/ORCACDefs/string.h b/ORCACDefs/string.h
index 35307f3..ba3f98e 100644
--- a/ORCACDefs/string.h
+++ b/ORCACDefs/string.h
@@ -36,6 +36,7 @@ void           *memset(void *, int, size_t);
 char           *strcat(char *, const char *);
 char           *strchr(const char *, int);
 int             strcmp(const char *, const char *);
+int             strcoll(const char *, const char *);
 char           *strcpy(char *, const char *);
 size_t          strcspn(const char *, const char *);
 char           *strerror(int);
@@ -55,5 +56,7 @@ char           *strrchr(const char *, int);
 size_t          strspn(const char *, const char *);
 char           *strstr(const char *, const char *);
 char           *strtok(char *, const char *);
+size_t          strxfrm(char *, const char *, size_t);
+
 
 #endif