diff --git a/vmm/src/vm.rs b/vmm/src/vm.rs
index 7c1e46529..ed2f4ef5f 100755
--- a/vmm/src/vm.rs
+++ b/vmm/src/vm.rs
@@ -51,7 +51,7 @@ use vm_memory::{
 use vmm_sys_util::eventfd::EventFd;
 use vmm_sys_util::terminal::Terminal;
 
-const X86_64_IRQ_BASE: u32 = 6;
+const X86_64_IRQ_BASE: u32 = 5;
 
 // CPUID feature bits
 const TSC_DEADLINE_TIMER_ECX_BIT: u8 = 24; // tsc deadline timer ecx bit.