--- /sys/src/9k/k10/syscall.c
+++ /sys/src/9k/k10/syscall.c
@@ -286,7 +286,7 @@ syscall(int scallnr, Ureg* ureg)
 		noted(ureg, *(uintptr*)(sp+BY2SE));
 
 	splhi();
-	if(scallnr != RFORK && (up->procctl || up->nnote))
+	if(scallnr != RFORK && scallnr != NSEC && (up->procctl || up->nnote))
 		notify(ureg);
 
 	/* if we delayed sched because we held a lock, sched now */
--- /sys/src/9k/mk/parse
+++ /sys/src/9k/mk/parse
@@ -241,6 +241,8 @@ function mksystab(					a, i, f, n, s, t){
 			t = t "{ .v = (void*)-1 } },\n";
 		else if($2 ~ "^(ALARM|_READ|_WRITE|PREAD|PWRITE)$")
 			t = t "{ .l = -1 } },\n";
+		else if($2 ~ "(NSEC)")
+			t = t "{ .vl = -1LL } },\n";
 		else
 			t = t "{ .i = -1 } },\n";
 	}
--- /sys/src/9k/port/sysproc.c
+++ /sys/src/9k/port/sysproc.c
@@ -1183,3 +1183,9 @@ syssemrelease(Ar0* ar0, va_list list)
 
 	ar0->i = semrelease(s, addr, delta);
 }
+
+void
+sysnsec(Ar0* ar0, va_list)
+{
+	ar0->vl = todget(nil);
+}
--- a/sys/src/9k/port/syscallfmt.c
+++ b/sys/src/9k/port/syscallfmt.c
@@ -293,6 +293,11 @@ syscallfmt(int syscallno, va_list list)
 			fmtprint(&fmt, " %lld", vl);
 		}
 		break;
+	case NSEC:
+		/* compilers on 32-bit systems insert &ret as only argument */
+		if (sizeof(void *) < sizeof(vlong))
+			fmtprint(&fmt, "%#p", va_arg(list, vlong*));
+		break;
 	}
 	up->syscalltrace = fmtstrflush(&fmt);
 }
@@ -326,6 +331,9 @@ sysretfmt(int syscallno, va_list list, Ar0* ar0, uvlong start, uvlong stop)
 			errstr = up->errstr;
 		fmtprint(&fmt, " = %ld", (long)ar0->l);
 		break;
+	case NSEC:
+		fmtprint(&fmt, " = %lld", ar0->vl);
+		break;
 	case EXEC:
 	case SEGBRK:
 	case SEGATTACH: