diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 0bfe64c5b9..14dced08a7 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -962,7 +962,7 @@ typedef struct CPUX86State {
     uint8_t has_error_code;
     uint32_t sipi_vector;
     bool tsc_valid;
-    int tsc_khz;
+    int64_t tsc_khz;
     void *kvm_xsave_buf;
 
     uint64_t mcg_cap;