diff --git a/src/cpu/kvm/base.hh b/src/cpu/kvm/base.hh
index a19152b1d6..070985d96a 100644
--- a/src/cpu/kvm/base.hh
+++ b/src/cpu/kvm/base.hh
@@ -55,6 +55,13 @@
 /** Signal to use to trigger exits from KVM */
 #define KVM_KICK_SIGNAL SIGRTMIN
 
+struct kvm_coalesced_mmio_ring;
+struct kvm_fpu;
+struct kvm_interrupt;
+struct kvm_regs;
+struct kvm_run;
+struct kvm_sregs;
+
 // forward declarations
 class ThreadContext;
 struct BaseKvmCPUParams;
diff --git a/src/cpu/kvm/vm.hh b/src/cpu/kvm/vm.hh
index 340e6f5c4f..d033bb6e3a 100644
--- a/src/cpu/kvm/vm.hh
+++ b/src/cpu/kvm/vm.hh
@@ -44,6 +44,11 @@
 #include "base/addr_range.hh"
 #include "sim/sim_object.hh"
 
+struct kvm_cpuid_entry2;
+struct kvm_cpuid2;
+struct kvm_msr_list;
+struct kvm_vcpu_init;
+
 // forward declarations
 struct KvmVMParams;
 class BaseKvmCPU;
diff --git a/src/cpu/kvm/x86_cpu.hh b/src/cpu/kvm/x86_cpu.hh
index a114a8a09f..19743f4be4 100644
--- a/src/cpu/kvm/x86_cpu.hh
+++ b/src/cpu/kvm/x86_cpu.hh
@@ -29,10 +29,19 @@
 #ifndef __CPU_KVM_X86_CPU_HH__
 #define __CPU_KVM_X86_CPU_HH__
 
+#include <vector>
+
 #include "cpu/kvm/base.hh"
 #include "cpu/kvm/vm.hh"
 #include "params/X86KvmCPU.hh"
 
+struct kvm_debugregs;
+struct kvm_msr_entry;
+struct kvm_msrs;
+struct kvm_vcpu_events;
+struct kvm_xcrs;
+struct kvm_xsave;
+
 /**
  * x86 implementation of a KVM-based hardware virtualized CPU.
  */