diff --git a/libmaxsi/x64/signal.s b/libmaxsi/x64/signal.s
index 0fc1c2f7..5d4bd395 100644
--- a/libmaxsi/x64/signal.s
+++ b/libmaxsi/x64/signal.s
@@ -33,6 +33,6 @@ SignalHandlerAssembly:
 	call SignalHandler
 
 	# Return control to the kernel, so normal computation can resume normally.
-	movl $3, %eax
+	movl $30, %eax # SysSigReturn
 	int $0x80