diff --git a/arch/x86_64/src/start.rs b/arch/x86_64/src/start.rs
index 5b0823f..ab65d17 100644
--- a/arch/x86_64/src/start.rs
+++ b/arch/x86_64/src/start.rs
@@ -212,7 +212,7 @@ pub unsafe fn usermode(ip: usize, sp: usize) -> ! {
 
         push rax # Push stack segment
         push rbx # Push stack pointer
-        mov rax, 3 << 12 | 1 << 9 # Set IOPL and interrupt enable flag
+        mov rax, 0 # 3 << 12 | 1 << 9 # Set IOPL and interrupt enable flag
         push rax # Push rflags
         mov rax, 0x23
         push rax # Push code segment
diff --git a/libstd b/libstd
index c6d6f70..7b20e73 160000
--- a/libstd
+++ b/libstd
@@ -1 +1 @@
-Subproject commit c6d6f70869b435a6c0940d9eb8b0dd6f2ec03663
+Subproject commit 7b20e739903a4877a10b64b875a3fd7a06cdcd16