global cleanup to use the new syscall interface
diff --git a/src/signal/sigaltstack.c b/src/signal/sigaltstack.c
index 6e46d09..550f2f9 100644
--- a/src/signal/sigaltstack.c
+++ b/src/signal/sigaltstack.c
@@ -14,5 +14,5 @@
 			return -1;
 		}
 	}
-	return syscall2(__NR_sigaltstack, (long)ss, (long)old);
+	return syscall(SYS_sigaltstack, ss, old);
 }