diff --git a/target-i386/kvm-stub.c b/target-i386/kvm-stub.c
index 11429c461e..2b9e8011fb 100644
--- a/target-i386/kvm-stub.c
+++ b/target-i386/kvm-stub.c
@@ -16,3 +16,15 @@ bool kvm_allows_irq0_override(void)
 {
     return 1;
 }
+
+#ifndef __OPTIMIZE__
+/* This function is only called inside conditionals which we
+ * rely on the compiler to optimize out when CONFIG_KVM is not
+ * defined.
+ */
+uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
+                                      uint32_t index, int reg)
+{
+    abort();
+}
+#endif