diff --git a/build.zig.zon b/build.zig.zon
index cef3b3d..67956cb 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -13,8 +13,8 @@
             .hash = "N-V-__8AAAAAjAwsopZIlbp4U6NN1Eh573uVdLTwl1mkFUug",
         },
         .zonfig = .{
-            .url = "git+https://github.com/rdmsr/zonfig?ref=HEAD#d02cbb9262c5e617676a252116c9cee3560b6e59",
-            .hash = "zonfig-0.1.0-V0D8-YtLFAAKh8PQgGaoCiGG1WUxWdqcY-iTysVPllQV",
+            .url = "git+https://github.com/rdmsr/zonfig?ref=HEAD#f2c9ab81c83750282ac4e4396a7537c6ecd0f7c2",
+            .hash = "zonfig-0.1.0-V0D8-ShLFACPRzB4c6AWjKwXlEdwxn-f6zt8eJKVwq_t",
         },
     },
 
diff --git a/src/arch/amd64/root.zig b/src/arch/amd64/root.zig
index 60183af..81a330a 100644
--- a/src/arch/amd64/root.zig
+++ b/src/arch/amd64/root.zig
@@ -682,11 +682,10 @@ pub const Idtr = extern struct {
 
 pub fn sidtr() Idtr {
     var idtr: Idtr = undefined;
-
-    asm volatile ("sidt %[p]"
+    asm volatile ("sidt (%[p])"
         :
-        : [p] "*p" (&idtr.limit),
-    );
+        : [p] "r" (&idtr),
+        : .{ .memory = true });
     return idtr;
 }