diff --git a/src/utils.rs b/src/utils.rs
index fa60d73..dbc03e7 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -94,7 +94,13 @@ fn check_token(token: proc_macro2::TokenTree, arg: &str) -> Option<String> {
                     // returns true.
                     .map_while(check_expression_is_path)
                     // Check if any yielded paths equal `arg`
-                    .any(|expr_path| expr_path.path.segments[0].ident.to_string().eq(arg))
+                    .any(|expr_path| {
+                        if let Some(last) = expr_path.path.segments.last() {
+                            last.ident.to_string().eq(arg)
+                        } else {
+                            false
+                        }
+                    })
                     // If so, return `Some(arg)`, otherwise `None`.
                     .then_some(arg.to_owned())
             })
diff --git a/test/issue-56/rust.rs b/test/issue-56/rust.rs
new file mode 100644
index 0000000..09f39f4
--- /dev/null
+++ b/test/issue-56/rust.rs
@@ -0,0 +1,9 @@
+#[derive(serde_repr::Serialize_repr)]
+#[repr(u16)]
+#[tsync]
+pub enum KeyCode {
+    Space = 32,
+    Apostrophe = 39,
+    Comma = 44,
+    Minus = 45,
+}
diff --git a/test/issue-56/tsync.sh b/test/issue-56/tsync.sh
new file mode 100755
index 0000000..1764bd6
--- /dev/null
+++ b/test/issue-56/tsync.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+
+cd $SCRIPT_DIR
+
+cargo run -- -i rust.rs -o typescript.d.ts
+cargo run -- -i rust.rs -o typescript.ts
\ No newline at end of file
diff --git a/test/issue-56/typescript.d.ts b/test/issue-56/typescript.d.ts
new file mode 100644
index 0000000..ac1d1c3
--- /dev/null
+++ b/test/issue-56/typescript.d.ts
@@ -0,0 +1,8 @@
+/* This file is generated and managed by tsync */
+
+declare enum KeyCode {
+  Space = 32,
+  Apostrophe = 39,
+  Comma = 44,
+  Minus = 45,
+}
diff --git a/test/issue-56/typescript.ts b/test/issue-56/typescript.ts
new file mode 100644
index 0000000..9b032ef
--- /dev/null
+++ b/test/issue-56/typescript.ts
@@ -0,0 +1,8 @@
+/* This file is generated and managed by tsync */
+
+export enum KeyCode {
+  Space = 32,
+  Apostrophe = 39,
+  Comma = 44,
+  Minus = 45,
+}
diff --git a/test/test_all.sh b/test/test_all.sh
index 89de09f..5af45fb 100755
--- a/test/test_all.sh
+++ b/test/test_all.sh
@@ -17,6 +17,7 @@ cd $SCRIPT_DIR
 ./issue-42-serde-rename/tsync.sh
 ./issue-43/tsync.sh
 ./issue-55/tsync.sh
+./issue-56/tsync.sh
 ./issue-58/tsync.sh
 ./issue-60/tsync.sh
 ./issue-63/tsync.sh