diff --git a/vcd/reader.py b/vcd/reader.py
index 10ee37c..cd8b1a9 100644
--- a/vcd/reader.py
+++ b/vcd/reader.py
@@ -413,6 +413,8 @@ def take_simple_identifier(self) -> List[int]:
             or c == 46  # '.' not in spec, but seen in the wild
             or c == 40  # '(' - produced by cva6 core
             or c == 41  # ')' - produced by cva6 core
+            or c == 91  # '[' seen in the wild
+            or c == 93  # ']' seen in the wild
         ):
             identifier.append(c)
             c = self.advance(raise_on_eof=False)