diff --git a/src/math/x86_64/lrintl.s b/src/math/x86_64/lrintl.s
index 5d6a15af..0e2c7712 100644
--- a/src/math/x86_64/lrintl.s
+++ b/src/math/x86_64/lrintl.s
@@ -3,5 +3,5 @@
 lrintl:
 	fldt 8(%rsp)
 	fistpl 8(%rsp)
-	mov 8(%rsp),%eax
+	movslq 8(%rsp),%rax
 	ret