diff --git a/src/librustc_codegen_llvm/llvm_util.rs b/src/librustc_codegen_llvm/llvm_util.rs
index e2d0e558d3b78..b46e6ef84b98b 100644
--- a/src/librustc_codegen_llvm/llvm_util.rs
+++ b/src/librustc_codegen_llvm/llvm_util.rs
@@ -147,6 +147,7 @@ const X86_WHITELIST: &[(&str, Option<&str>)] = &[
     ("fxsr", None),
     ("lzcnt", None),
     ("mmx", Some("mmx_target_feature")),
+    ("movbe", Some("movbe_target_feature")),
     ("pclmulqdq", None),
     ("popcnt", None),
     ("rdrand", None),
diff --git a/src/librustc_typeck/collect.rs b/src/librustc_typeck/collect.rs
index 120467cbd13a0..4275022c4f6d4 100644
--- a/src/librustc_typeck/collect.rs
+++ b/src/librustc_typeck/collect.rs
@@ -2205,6 +2205,7 @@ fn from_target_feature(
                 Some("wasm_target_feature") => rust_features.wasm_target_feature,
                 Some("cmpxchg16b_target_feature") => rust_features.cmpxchg16b_target_feature,
                 Some("adx_target_feature") => rust_features.adx_target_feature,
+                Some("movbe_target_feature") => rust_features.movbe_target_feature,
                 Some(name) => bug!("unknown target feature gate {}", name),
                 None => true,
             };
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 2820924824697..9dd17b420aa44 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -394,6 +394,7 @@ declare_features! (
     (active, wasm_target_feature, "1.30.0", Some(44839), None),
     (active, adx_target_feature, "1.32.0", Some(44839), None),
     (active, cmpxchg16b_target_feature, "1.32.0", Some(44839), None),
+    (active, movbe_target_feature, "1.34.0", Some(44839), None),
 
     // Allows macro invocations on modules expressions and statements and
     // procedural macros to expand to non-items.
diff --git a/src/test/ui/target-feature-gate.rs b/src/test/ui/target-feature-gate.rs
index 30fb534dbb591..84300301b7629 100644
--- a/src/test/ui/target-feature-gate.rs
+++ b/src/test/ui/target-feature-gate.rs
@@ -22,6 +22,7 @@
 // gate-test-wasm_target_feature
 // gate-test-adx_target_feature
 // gate-test-cmpxchg16b_target_feature
+// gate-test-movbe_target_feature
 // min-llvm-version 6.0
 
 #[target_feature(enable = "avx512bw")]
diff --git a/src/test/ui/target-feature-gate.stderr b/src/test/ui/target-feature-gate.stderr
index 8dfb4f65f98c4..24141d0064fb0 100644
--- a/src/test/ui/target-feature-gate.stderr
+++ b/src/test/ui/target-feature-gate.stderr
@@ -1,5 +1,5 @@
 error[E0658]: the target feature `avx512bw` is currently unstable (see issue #44839)
-  --> $DIR/target-feature-gate.rs:27:18
+  --> $DIR/target-feature-gate.rs:28:18
    |
 LL | #[target_feature(enable = "avx512bw")]
    |                  ^^^^^^^^^^^^^^^^^^^