diff --git a/python/resdata/grid/faults/fault_block_layer.py b/python/resdata/grid/faults/fault_block_layer.py
index cb5d177fa..aa095b07f 100644
--- a/python/resdata/grid/faults/fault_block_layer.py
+++ b/python/resdata/grid/faults/fault_block_layer.py
@@ -111,7 +111,7 @@ def scan_keyword(self, fault_block_kw):
             raise ValueError(
                 "The fault block keyword had wrong type/size: type:%s  size:%d  grid_size:%d"
                 % (
-                    fault_block_kw.type_name,
+                    fault_block_kw.type_name(),
                     len(fault_block_kw),
                     self.grid_ref.getGlobalSize(),
                 )
@@ -126,7 +126,7 @@ def load_keyword(self, fault_block_kw):
             raise ValueError(
                 "The fault block keyword had wrong type/size:  type:%s  size:%d  grid_size:%d"
                 % (
-                    fault_block_kw.type_name,
+                    fault_block_kw.type_name(),
                     len(fault_block_kw),
                     self.grid_ref.getGlobalSize(),
                 )
diff --git a/python/resdata/grid/rd_region.py b/python/resdata/grid/rd_region.py
index 8955338ea..add2e7bec 100644
--- a/python/resdata/grid/rd_region.py
+++ b/python/resdata/grid/rd_region.py
@@ -552,7 +552,7 @@ def select_equal(self, rd_kw, value, intersect=False):
         if not rd_kw.data_type.is_int():
             raise ValueError(
                 "The select_equal method must have an integer valued keyword - got:%s"
-                % rd_kw.type_name
+                % rd_kw.type_name()
             )
         self._select_equal(rd_kw, value)
 
@@ -565,7 +565,7 @@ def deselect_equal(self, rd_kw, value):
         if not rd_kw.data_type.is_int():
             raise ValueError(
                 "The select_equal method must have an integer valued keyword - got:%s"
-                % rd_kw.type_name
+                % rd_kw.type_name()
             )
         self._deselect_equal(rd_kw, value)
 
diff --git a/python/resdata/resfile/rd_kw.py b/python/resdata/resfile/rd_kw.py
index c4b73d463..c57c1bf57 100644
--- a/python/resdata/resfile/rd_kw.py
+++ b/python/resdata/resfile/rd_kw.py
@@ -975,7 +975,6 @@ def type(self):
     def data_type(self):
         return self._get_data_type()
 
-    @property
     def type_name(self):
         return self.data_type.type_name
 
@@ -991,7 +990,7 @@ def get_rd_type(self):
 
     @property
     def header(self):
-        return (self.get_name(), len(self), self.type_name)
+        return (self.get_name(), len(self), self.type_name())
 
     @property
     def array(self):
@@ -1033,7 +1032,7 @@ def str(self, width=5, max_lines=10, fmt=None):
         the elements. The implementation of the builtin method
         __str__() is based on this method.
         """
-        s = "%-8s %8d %-4s\n" % (self.get_name(), len(self), self.type_name)
+        s = "%-8s %8d %-4s\n" % (self.get_name(), len(self), self.type_name())
         lines = len(self) // width
         if not fmt:
             fmt = self.str_fmt + " "
diff --git a/python/tests/rd_tests/test_rd_kw.py b/python/tests/rd_tests/test_rd_kw.py
index 914cfb2e7..58f321a15 100644
--- a/python/tests/rd_tests/test_rd_kw.py
+++ b/python/tests/rd_tests/test_rd_kw.py
@@ -422,7 +422,7 @@ def test_resize(self):
     def test_typename(self):
         kw = ResdataKW("KW", 100, ResDataType.RD_INT)
 
-        self.assertEqual(kw.type_name, "INTE")
+        self.assertEqual(kw.type_name(), "INTE")
 
     def test_string_alloc(self):
         kw = ResdataKW("KW", 10, ResDataType.RD_STRING(30))