diff --git a/src/math/x86_64/llrintl.s b/src/math/x86_64/llrintl.s
index 3f3b7eea..1ec0817d 100644
--- a/src/math/x86_64/llrintl.s
+++ b/src/math/x86_64/llrintl.s
@@ -2,6 +2,6 @@
 .type llrintl,@function
 llrintl:
 	fldt 8(%rsp)
-	fistpq 8(%rsp)
+	fistpll 8(%rsp)
 	mov 8(%rsp),%rax
 	ret