diff --git a/libc/calls/_timespec_mono.c b/libc/calls/_timespec_mono.c
index 191784f4f..376966d81 100644
--- a/libc/calls/_timespec_mono.c
+++ b/libc/calls/_timespec_mono.c
@@ -19,13 +19,9 @@
 #include "libc/assert.h"
 #include "libc/calls/struct/timespec.h"
 #include "libc/sysv/consts/clock.h"
-#include "libc/sysv/consts/nr.h"
-#include "libc/time/time.h"
 
 struct timespec _timespec_mono(void) {
-  int ax, dx;
   struct timespec ts;
-  ax = clock_gettime(CLOCK_MONOTONIC_FAST, &ts);
-  assert(!ax);
+  _npassert(!clock_gettime(CLOCK_MONOTONIC_FAST, &ts));
   return ts;
 }
diff --git a/libc/calls/_timespec_real.c b/libc/calls/_timespec_real.c
index 80912dc1f..2e49004c6 100644
--- a/libc/calls/_timespec_real.c
+++ b/libc/calls/_timespec_real.c
@@ -16,15 +16,12 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/assert.h"
 #include "libc/calls/struct/timespec.h"
 #include "libc/sysv/consts/clock.h"
-#include "libc/sysv/consts/nr.h"
-#include "libc/time/time.h"
 
 struct timespec _timespec_real(void) {
-  int ax, dx;
   struct timespec ts;
-  ax = clock_gettime(CLOCK_REALTIME_FAST, &ts);
-  if (ax) notpossible;
+  _npassert(!clock_gettime(CLOCK_REALTIME_FAST, &ts));
   return ts;
 }
diff --git a/libc/calls/_timespec_tomicros.c b/libc/calls/_timespec_tomicros.c
index 04cc75766..543c31234 100644
--- a/libc/calls/_timespec_tomicros.c
+++ b/libc/calls/_timespec_tomicros.c
@@ -27,6 +27,8 @@ int64_t _timespec_tomicros(struct timespec x) {
   if (!__builtin_mul_overflow(x.tv_sec, 1000000ul, &us) &&
       !__builtin_add_overflow(us, x.tv_nsec / 1000, &us)) {
     return us;
+  } else if (x.tv_sec < 0) {
+    return INT64_MIN;
   } else {
     return INT64_MAX;
   }
diff --git a/libc/calls/_timespec_tomillis.c b/libc/calls/_timespec_tomillis.c
index dffa0b29c..20ef6f2c5 100644
--- a/libc/calls/_timespec_tomillis.c
+++ b/libc/calls/_timespec_tomillis.c
@@ -27,6 +27,8 @@ int64_t _timespec_tomillis(struct timespec x) {
   if (!__builtin_mul_overflow(x.tv_sec, 1000ul, &ms) &&
       !__builtin_add_overflow(ms, x.tv_nsec / 1000000, &ms)) {
     return ms;
+  } else if (x.tv_sec < 0) {
+    return INT64_MIN;
   } else {
     return INT64_MAX;
   }
diff --git a/libc/calls/_timespec_tonanos.c b/libc/calls/_timespec_tonanos.c
index 4e80a0539..369b66ed0 100644
--- a/libc/calls/_timespec_tonanos.c
+++ b/libc/calls/_timespec_tonanos.c
@@ -27,6 +27,8 @@ int64_t _timespec_tonanos(struct timespec x) {
   if (!__builtin_mul_overflow(x.tv_sec, 1000000000ul, &ns) &&
       !__builtin_add_overflow(ns, x.tv_nsec, &ns)) {
     return ns;
+  } else if (x.tv_sec < 0) {
+    return INT64_MIN;
   } else {
     return INT64_MAX;
   }
diff --git a/test/libc/calls/_timespec_test.c b/test/libc/calls/_timespec_test.c
index 4f5887609..bd2d586d9 100644
--- a/test/libc/calls/_timespec_test.c
+++ b/test/libc/calls/_timespec_test.c
@@ -17,6 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/struct/timespec.h"
+#include "libc/limits.h"
 #include "libc/stdio/rand.h"
 #include "libc/testlib/testlib.h"
 
@@ -64,14 +65,20 @@ TEST(_timespec_frommicros, test) {
 
 TEST(_timespec_tomillis, test) {
   EXPECT_EQ(2123, _timespec_tomillis((struct timespec){2, 123000000}));
+  EXPECT_EQ(INT64_MAX, _timespec_tomillis((struct timespec){INT64_MAX, 0}));
+  EXPECT_EQ(INT64_MIN, _timespec_tomillis((struct timespec){INT64_MIN, 0}));
 }
 
 TEST(_timespec_tomicros, test) {
   EXPECT_EQ(2000123, _timespec_tomicros((struct timespec){2, 123000}));
+  EXPECT_EQ(INT64_MAX, _timespec_tomicros((struct timespec){INT64_MAX, 0}));
+  EXPECT_EQ(INT64_MIN, _timespec_tomicros((struct timespec){INT64_MIN, 0}));
 }
 
 TEST(_timespec_tonanos, test) {
   EXPECT_EQ(2000123000, _timespec_tonanos((struct timespec){2, 123000}));
+  EXPECT_EQ(INT64_MAX, _timespec_tonanos((struct timespec){INT64_MAX, 0}));
+  EXPECT_EQ(INT64_MIN, _timespec_tonanos((struct timespec){INT64_MIN, 0}));
 }
 
 static long mod(long x, long y) {