diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c
index 9c3a8d2440c9..899850bd6f0b 100644
--- a/lib/vdso/gettimeofday.c
+++ b/lib/vdso/gettimeofday.c
@@ -8,7 +8,7 @@
 #ifndef vdso_calc_ns
 
 #ifdef VDSO_DELTA_NOMASK
-# define VDSO_DELTA_MASK(vd)	U64_MAX
+# define VDSO_DELTA_MASK(vd)	ULLONG_MAX
 #else
 # define VDSO_DELTA_MASK(vd)	(vd->mask)
 #endif