diff --git a/ORCACDefs/stdio.h b/ORCACDefs/stdio.h
index 0c2f15e..7afed0b 100644
--- a/ORCACDefs/stdio.h
+++ b/ORCACDefs/stdio.h
@@ -152,8 +152,11 @@ FILE           *tmpfile(void);
 char           *tmpnam(char *);
 int             ungetc(int c, FILE *);
 int             vfprintf(FILE *, const char *, __va_list);
+int             vfscanf(FILE *, const char *, __va_list);
 int             vprintf(const char *, __va_list);
+int             vscanf(const char *, __va_list);
 int             vsprintf(char *, const char *, __va_list);
 int             vsnprintf(char *, size_t, const char *, __va_list);
+int             vsscanf(const char *, const char *, __va_list);
 
 #endif