diff --git a/src/peakrdl_regblock/hwif/__init__.py b/src/peakrdl_regblock/hwif/__init__.py
index 3298f50..4ff95f0 100644
--- a/src/peakrdl_regblock/hwif/__init__.py
+++ b/src/peakrdl_regblock/hwif/__init__.py
@@ -49,6 +49,23 @@ class Hwif:
         return self.exp.ds.top_node
 
 
+    def get_extra_package_params(self) -> str:
+        lines = []
+
+        for param in self.top_node.inst.parameters:
+            value = param.get_value()
+            if isinstance(value, int):
+                lines.append(
+                    f"localparam {param.name} = {SVInt(value)};"
+                )
+            elif isinstance(value, str):
+                lines.append(
+                    f"localparam {param.name} = {value};"
+                )
+
+        return "\n".join(lines)
+
+
     def get_package_contents(self) -> str:
         """
         If this hwif requires a package, generate the string
diff --git a/src/peakrdl_regblock/package_tmpl.sv b/src/peakrdl_regblock/package_tmpl.sv
index 5aa5ed3..5e71fc6 100644
--- a/src/peakrdl_regblock/package_tmpl.sv
+++ b/src/peakrdl_regblock/package_tmpl.sv
@@ -7,6 +7,8 @@ package {{ds.package_name}};
     localparam {{ds.module_name.upper()}}_MIN_ADDR_WIDTH = {{ds.addr_width}};
     localparam {{ds.module_name.upper()}}_SIZE = {{SVInt(ds.top_node.size)}};
 
+    {{hwif.get_extra_package_params()|indent}}
+
     {{hwif.get_package_contents()|indent}}
 endpackage
 {# (eof newline anchor) #}
diff --git a/tests/test_pkg_params/__init__.py b/tests/test_pkg_params/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_pkg_params/regblock.rdl b/tests/test_pkg_params/regblock.rdl
new file mode 100644
index 0000000..41660de
--- /dev/null
+++ b/tests/test_pkg_params/regblock.rdl
@@ -0,0 +1,11 @@
+addrmap top #(
+    longint N_REGS = 1,
+    longint REGWIDTH = 32,
+    string NAME = "abcd"
+) {
+    reg reg_t {
+        regwidth = REGWIDTH;
+        field {sw=rw; hw=na;} f[REGWIDTH] = 1;
+    };
+    reg_t regs[N_REGS];
+};
diff --git a/tests/test_pkg_params/tb_template.sv b/tests/test_pkg_params/tb_template.sv
new file mode 100644
index 0000000..b33b3d2
--- /dev/null
+++ b/tests/test_pkg_params/tb_template.sv
@@ -0,0 +1,8 @@
+{% extends "lib/tb_base.sv" %}
+
+{% block seq %}
+    {% sv_line_anchor %}
+    assert(regblock_pkg::N_REGS == {{testcase.n_regs}});
+    assert(regblock_pkg::REGWIDTH == {{testcase.regwidth}});
+    assert(regblock_pkg::NAME == "{{testcase.name}}");
+{% endblock %}
diff --git a/tests/test_pkg_params/testcase.py b/tests/test_pkg_params/testcase.py
new file mode 100644
index 0000000..790b21b
--- /dev/null
+++ b/tests/test_pkg_params/testcase.py
@@ -0,0 +1,27 @@
+from parameterized import parameterized_class
+
+from ..lib.sim_testcase import SimTestCase
+from ..lib.test_params import get_permutations
+
+PARAMS = get_permutations({
+    "n_regs" : [1, 2],
+    "regwidth" : [8, 16],
+    "name" : ["hello", "world"],
+})
+@parameterized_class(PARAMS)
+class TestRetimedFanin(SimTestCase):
+    n_regs = 20
+    regwidth = 32
+    name = "xyz"
+
+    @classmethod
+    def setUpClass(cls):
+        cls.rdl_elab_params = {
+            "N_REGS": cls.n_regs,
+            "REGWIDTH": cls.regwidth,
+            "NAME": f'"{cls.name}"',
+        }
+        super().setUpClass()
+
+    def test_dut(self):
+        self.run_test()