diff --git a/src/linux/ppoll.c b/src/linux/ppoll.c
index 9e262477..e614600a 100644
--- a/src/linux/ppoll.c
+++ b/src/linux/ppoll.c
@@ -1,10 +1,26 @@
 #define _GNU_SOURCE
 #include <poll.h>
 #include <signal.h>
+#include <errno.h>
 #include "syscall.h"
 
+#define IS32BIT(x) !((x)+0x80000000ULL>>32)
+#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
+
 int ppoll(struct pollfd *fds, nfds_t n, const struct timespec *to, const sigset_t *mask)
 {
+	time_t s = to ? to->tv_sec : 0;
+	long ns = to ? to->tv_nsec : 0;
+#ifdef SYS_ppoll_time64
+	int r = -ENOSYS;
+	if (SYS_ppoll == SYS_ppoll_time64 || !IS32BIT(s))
+		r = __syscall_cp(SYS_ppoll_time64, fds, n,
+			to ? ((long long[]){s, ns}) : 0,
+			mask, _NSIG/8);
+	if (SYS_ppoll == SYS_ppoll_time64 || r != -ENOSYS)
+		return __syscall_ret(r);
+	s = CLAMP(s);
+#endif
 	return syscall_cp(SYS_ppoll, fds, n,
-		to ? (struct timespec []){*to} : 0, mask, _NSIG/8);
+		to ? ((long[]){s, ns}) : 0, mask, _NSIG/8);
 }
diff --git a/src/select/pselect.c b/src/select/pselect.c
index 762af37f..54cfb291 100644
--- a/src/select/pselect.c
+++ b/src/select/pselect.c
@@ -1,12 +1,26 @@
 #include <sys/select.h>
 #include <signal.h>
 #include <stdint.h>
+#include <errno.h>
 #include "syscall.h"
 
+#define IS32BIT(x) !((x)+0x80000000ULL>>32)
+#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
+
 int pselect(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restrict efds, const struct timespec *restrict ts, const sigset_t *restrict mask)
 {
 	syscall_arg_t data[2] = { (uintptr_t)mask, _NSIG/8 };
-	struct timespec ts_tmp;
-	if (ts) ts_tmp = *ts;
-	return syscall_cp(SYS_pselect6, n, rfds, wfds, efds, ts ? &ts_tmp : 0, data);
+	time_t s = ts ? ts->tv_sec : 0;
+	long ns = ts ? ts->tv_nsec : 0;
+#ifdef SYS_pselect6_time64
+	int r = -ENOSYS;
+	if (SYS_pselect6 == SYS_pselect6_time64 || !IS32BIT(s))
+		r = __syscall_cp(SYS_pselect6_time64, n, rfds, wfds, efds,
+			ts ? ((long long[]){s, ns}) : 0, data);
+	if (SYS_pselect6 == SYS_pselect6_time64 || r!=-ENOSYS)
+		return __syscall_ret(r);
+	s = CLAMP(s);
+#endif
+	return syscall_cp(SYS_pselect6, n, rfds, wfds, efds,
+		ts ? ((long[]){s, ns}) : 0, data);
 }