diff --git a/Makefile b/Makefile
index 2efbec40238fe59b4aebc8f5d737e32f89d3e784..3fc88f32bdd22f7fdbbf3f15c5afd2e009b72bab 100644
--- a/Makefile
+++ b/Makefile
@@ -54,7 +54,7 @@ $(BUILD)/debug/libc.a: $(SRC)
 	touch $@
 
 $(BUILD)/debug/crt0.o: $(SRC)
-	CARGO_INCREMENTAL=0 cargo --verbose --verbose rustc --manifest-path src/crt0/Cargo.toml $(CARGOFLAGS) -- --emit obj=$@
+	CARGO_INCREMENTAL=0 cargo rustc --manifest-path src/crt0/Cargo.toml $(CARGOFLAGS) -- --emit obj=$@
 	touch $@
 
 $(BUILD)/release/libc.a: $(SRC)
diff --git a/src/crt0/src/lib.rs b/src/crt0/src/lib.rs
index 9de7f3c9643066e91213c6d41c719de7e87ee0f2..fc9ac5290a345df26682cc8174d952224b575961 100644
--- a/src/crt0/src/lib.rs
+++ b/src/crt0/src/lib.rs
@@ -15,6 +15,7 @@ use platform::types::*;
 pub unsafe extern "C" fn _start() {
     #[cfg(target_arch = "x86_64")]
     asm!("mov rdi, rsp
+        and rsp, 0xFFFFFFFFFFFFFFF0
         call _start_rust"
         :
         :