1 files changed, 4 insertions, 1 deletions

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index a9bda0a361f3..e4e9031dd9c3 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -269,6 +269,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
         int qualifier;          /* 'h', 'l', or 'L' for integer fields */
                                 /* 'z' support added 23/7/1999 S.H.    */
                                 /* 'z' changed to 'Z' --davidm 1/25/99 */
+                                /* 't' added for ptrdiff_t */
 
         /* Reject out-of-range values early */
         if (unlikely((int) size < 0)) {
@@ -339,7 +340,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
                 /* get the conversion qualifier */
                 qualifier = -1;
                 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
-                    *fmt =='Z' || *fmt == 'z') {
+                    *fmt =='Z' || *fmt == 'z' || *fmt == 't') {
                         qualifier = *fmt;
                         ++fmt;
                         if (qualifier == 'l' && *fmt == 'l') {
@@ -467,6 +468,8 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
                                 num = (signed long) num;
                 } else if (qualifier == 'Z' || qualifier == 'z') {
                         num = va_arg(args, size_t);
+                } else if (qualifier == 't') {
+                        num = va_arg(args, ptrdiff_t);
                 } else if (qualifier == 'h') {
                         num = (unsigned short) va_arg(args, int);
                         if (flags & SIGN)