diff --git a/os/hal/lib/streams/chprintf.c b/os/hal/lib/streams/chprintf.c
index 681df1082..33134da96 100644
--- a/os/hal/lib/streams/chprintf.c
+++ b/os/hal/lib/streams/chprintf.c
@@ -283,6 +283,8 @@ int chvprintf(BaseSequentialStream *chp, const char *fmt, va_list ap) {
 #endif
     case 'X':
     case 'x':
+    case 'P':
+    case 'p':
       c = 16;
       goto unsigned_common;
     case 'U':