diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index e5c813199a0d93cac2598d14b36395f6514c0049..a61cd6d99d1f2bc0bc0ebb1a441f4bb63ac20d8b 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1050,7 +1050,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             "ssb-no", "mds-no", "pschange-mc-no", "tsx-ctrl",
             "taa-no", NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
-            NULL, NULL, NULL, NULL,
+            NULL, "fb-clear", NULL, NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 3c6f9226e1f18a48e06dfa6e314d08429d76afd0..7201a71de8638edad22a6aadb536111d4a1b61b4 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1018,6 +1018,7 @@ uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
 #define MSR_ARCH_CAP_PSCHANGE_MC_NO     (1U << 6)
 #define MSR_ARCH_CAP_TSX_CTRL_MSR       (1U << 7)
 #define MSR_ARCH_CAP_TAA_NO             (1U << 8)
+#define MSR_ARCH_CAP_FB_CLEAR           (1U << 17)
 
 #define MSR_CORE_CAP_SPLIT_LOCK_DETECT  (1U << 5)