diff --git a/crates/oxc_minifier/src/peephole/remove_unused_declaration.rs b/crates/oxc_minifier/src/peephole/remove_unused_declaration.rs
index ce278314411e0..edbc1623ca6ec 100644
--- a/crates/oxc_minifier/src/peephole/remove_unused_declaration.rs
+++ b/crates/oxc_minifier/src/peephole/remove_unused_declaration.rs
@@ -148,6 +148,9 @@ mod test {
             &options,
         );
 
+        // decorators
+        test_same_options("class C { @dec foo() {} }", &options);
+
         // TypeError
         test_same_options("class C extends (() => {}) {}", &options);
     }
diff --git a/crates/oxc_minifier/src/peephole/remove_unused_expression.rs b/crates/oxc_minifier/src/peephole/remove_unused_expression.rs
index 4f6939bce98fc..6734d4666a042 100644
--- a/crates/oxc_minifier/src/peephole/remove_unused_expression.rs
+++ b/crates/oxc_minifier/src/peephole/remove_unused_expression.rs
@@ -677,6 +677,7 @@ impl<'a> PeepholeOptimizations {
         // Keep the entire class if non-empty static block exists.
         for e in &c.body.body {
             match e {
+                e if e.has_decorator() => return None,
                 ClassElement::TSIndexSignature(_) => return None,
                 ClassElement::StaticBlock(block) => {
                     if !block.body.is_empty() {
@@ -1132,6 +1133,9 @@ mod test {
             &options,
         );
 
+        // decorators
+        test_same_options("(class { @dec foo() {} })", &options);
+
         // TypeError
         test_same_options("(class extends (() => {}) {})", &options);
     }