diff --git a/src/peakrdl_ipxact/__about__.py b/src/peakrdl_ipxact/__about__.py
index 567bfde..922fee7 100644
--- a/src/peakrdl_ipxact/__about__.py
+++ b/src/peakrdl_ipxact/__about__.py
@@ -1 +1 @@
-__version__ = "3.4.3"
+__version__ = "3.4.4"
diff --git a/src/peakrdl_ipxact/__peakrdl__.py b/src/peakrdl_ipxact/__peakrdl__.py
index 897e5c9..d338c41 100644
--- a/src/peakrdl_ipxact/__peakrdl__.py
+++ b/src/peakrdl_ipxact/__peakrdl__.py
@@ -73,7 +73,7 @@ def is_compatible(self, path: str) -> bool:
         with open(path, "r", encoding="utf-8") as f:
             if re.search(r"<(spirit|ipxact):component\b", f.read()):
                 return True
-        return False
+        return False # type: ignore [unreachable]
 
     def add_importer_arguments(self, arg_group: 'argparse.ArgumentParser') -> None:
         arg_group.add_argument(
diff --git a/src/peakrdl_ipxact/exporter.py b/src/peakrdl_ipxact/exporter.py
index 849e478..1cd42e2 100644
--- a/src/peakrdl_ipxact/exporter.py
+++ b/src/peakrdl_ipxact/exporter.py
@@ -398,7 +398,7 @@ def add_register(self, parent: minidom.Element, node: RegNode) -> None:
             mask = 0
             for field in node.fields(skip_not_present=False):
                 field_reset = field.get_property("reset")
-                if field_reset is not None:
+                if isinstance(field_reset, int):
                     field_mask = ((1 << field.width) - 1) << field.lsb
                     field_reset = (field_reset << field.lsb) & field_mask
                     reset |= field_reset
@@ -439,7 +439,7 @@ def add_field(self, parent: minidom.Element, node: FieldNode) -> None:
 
         if self.standard >= Standard.IEEE_1685_2014:
             reset = node.get_property("reset")
-            if reset is not None:
+            if isinstance(reset, int):
                 resets_el = self.doc.createElement(self.ns + "resets")
                 field.appendChild(resets_el)
                 reset_el = self.doc.createElement(self.ns + "reset")
diff --git a/src/peakrdl_ipxact/importer.py b/src/peakrdl_ipxact/importer.py
index 1d01c47..514369f 100644
--- a/src/peakrdl_ipxact/importer.py
+++ b/src/peakrdl_ipxact/importer.py
@@ -700,7 +700,7 @@ def parse_integer(self, s: str) -> int:
                 v *= multiplier[m.group(2).upper()]
             return v
 
-        m = re.fullmatch(r"\d*'h([0-9a-f]+)", s, re.I)
+        m = re.fullmatch(r"\d*'h([0-9a-f]+)", s, re.I) # type: ignore [unreachable]
         if m:
             return int(m.group(1), 16)