diff --git a/src/cpu/qemu-x86/cache_as_ram_bootblock.S b/src/cpu/qemu-x86/cache_as_ram_bootblock.S
index 148948b..197e0fd 100644
--- a/src/cpu/qemu-x86/cache_as_ram_bootblock.S
+++ b/src/cpu/qemu-x86/cache_as_ram_bootblock.S
@@ -33,7 +33,7 @@
 	/* Restore the BIST result and timestamps. */
 #if defined(__x86_64__)
 	movd	%mm2, %rdi
-	shld	%rdi, 32
+	shlq	$32, %rdi
 	movd	%mm1, %rsi
 	or	%rsi, %rdi