diff --git a/compiler/rustc_ast_pretty/src/pprust/state.rs b/compiler/rustc_ast_pretty/src/pprust/state.rs
index 2cdec2138ad..1e18f0779f0 100644
--- a/compiler/rustc_ast_pretty/src/pprust/state.rs
+++ b/compiler/rustc_ast_pretty/src/pprust/state.rs
@@ -627,6 +627,13 @@ fn print_attribute_inline(&mut self, attr: &ast::Attribute, is_inline: bool) {
 
     fn print_attr_item(&mut self, item: &ast::AttrItem, span: Span) {
         self.ibox(0);
+        match item.unsafety {
+            ast::Safety::Unsafe(_) => {
+                self.word("unsafe");
+                self.popen();
+            }
+            ast::Safety::Default | ast::Safety::Safe(_) => {}
+        }
         match &item.args {
             AttrArgs::Delimited(DelimArgs { dspan: _, delim, tokens }) => self.print_mac_common(
                 Some(MacHeader::Path(&item.path)),
@@ -655,6 +662,10 @@ fn print_attr_item(&mut self, item: &ast::AttrItem, span: Span) {
                 self.word(token_str);
             }
         }
+        match item.unsafety {
+            ast::Safety::Unsafe(_) => self.pclose(),
+            ast::Safety::Default | ast::Safety::Safe(_) => {}
+        }
         self.end();
     }
 
diff --git a/tests/ui/unpretty/unsafe-attr.stdout b/tests/ui/unpretty/unsafe-attr.stdout
index 5d199337524..8734ea86b6d 100644
--- a/tests/ui/unpretty/unsafe-attr.stdout
+++ b/tests/ui/unpretty/unsafe-attr.stdout
@@ -4,7 +4,7 @@
 #[no_mangle]
 extern "C" fn foo() {}
 
-#[no_mangle]
+#[unsafe(no_mangle)]
 extern "C" fn bar() {}
 
 #[cfg_attr(FALSE, unsafe(no_mangle))]