diff --git a/com_redhat_kdump/gui/spokes/kdump.glade b/com_redhat_kdump/gui/spokes/kdump.glade
index 4016724..67df028 100644
--- a/com_redhat_kdump/gui/spokes/kdump.glade
+++ b/com_redhat_kdump/gui/spokes/kdump.glade
@@ -197,6 +197,17 @@
                             <property name="top-attach">0</property>
                           </packing>
                         </child>
+                        <child>
+                          <object class="GtkLabel" id="rangeReservedMemMBLabel">
+                            <property name="visible">True</property>
+                            <property name="can-focus">False</property>
+                            <property name="halign">start</property>
+                          </object>
+                          <packing>
+                            <property name="left-attach">2</property>
+                            <property name="top-attach">0</property>
+                          </packing>
+                        </child>
                         <child>
                           <object class="GtkLabel" id="totalMemLabel">
                             <property name="visible">True</property>
diff --git a/com_redhat_kdump/gui/spokes/kdump.py b/com_redhat_kdump/gui/spokes/kdump.py
index 2b759d6..c313f43 100644
--- a/com_redhat_kdump/gui/spokes/kdump.py
+++ b/com_redhat_kdump/gui/spokes/kdump.py
@@ -76,6 +76,7 @@ def initialize(self):
         self._manualButton = self.builder.get_object("manualButton")
         self._fadumpButton = self.builder.get_object("fadumpCheck")
         self._toBeReservedSpin = self.builder.get_object("toBeReservedSpin")
+        self._rangeReservedMemMBLabel = self.builder.get_object("rangeReservedMemMBLabel")
         self._totalMemMB = self.builder.get_object("totalMemMB")
         self._usableMemMB = self.builder.get_object("usableMemMB")
         self._autoWarn = self.builder.get_object("autoReservationWarning")
@@ -92,6 +93,7 @@ def initialize(self):
         adjustment = Gtk.Adjustment(lower, lower, upper, step, step, 0)
         self._toBeReservedSpin.set_adjustment(adjustment)
         self._toBeReservedSpin.set_value(lower)
+        self._rangeReservedMemMBLabel.set_text("  (%d - %d MB)" % (lower, upper))
 
         # Connect a callback to the PropertiesChanged signal.
         storage = STORAGE.get_proxy()
@@ -142,7 +144,7 @@ def apply(self):
         if self._autoButton.get_active():
             self._proxy.ReservedMemory = "auto"
         else:
-            self._proxy.ReservedMemory = "%dM" % self._toBeReservedSpin.get_value_as_int()
+            self._proxy.ReservedMemory = "%d" % self._toBeReservedSpin.get_value_as_int()
         self._proxy.FadumpEnabled = self._fadumpButton.get_active()
 
         # This hub have been visited, use should now be aware of the crypted devices issue
diff --git a/com_redhat_kdump/service/kdump.py b/com_redhat_kdump/service/kdump.py
index 3f2a14c..eea56a5 100755
--- a/com_redhat_kdump/service/kdump.py
+++ b/com_redhat_kdump/service/kdump.py
@@ -49,6 +49,7 @@ def __init__(self):
 
         self._reserved_memory = "auto"
         self.reserved_memory_changed = Signal()
+        self._lower, self._upper, self._step = getMemoryBounds()
 
     def publish(self):
         """Publish the DBus objects."""
@@ -78,6 +79,14 @@ def fadump_enabled(self, value):
         self.fadump_enabled_changed.emit()
         log.debug("Fadump enabled is set to '%s'.", value)
 
+    def check_reserved_memory(self, value):
+        if value != "auto":
+            if int(value) > self._upper:
+                value = str(int(self._upper))
+            if int(value) < self._lower:
+                value = str(int(self._lower))
+        return value
+
     @property
     def reserved_memory(self):
         """Amount of memory in MB to reserve for kdump."""
@@ -85,7 +94,7 @@ def reserved_memory(self):
 
     @reserved_memory.setter
     def reserved_memory(self, value):
-        self._reserved_memory = value
+        self._reserved_memory = self.check_reserved_memory(value)
         self.reserved_memory_changed.emit()
         log.debug("Reserved memory is set to '%s'.", value)
 
diff --git a/test/unit_tests/test_interface.py b/test/unit_tests/test_interface.py
index dbac003..4689767 100644
--- a/test/unit_tests/test_interface.py
+++ b/test/unit_tests/test_interface.py
@@ -1,7 +1,9 @@
 from unittest.case import TestCase
+from unittest.mock import patch
 from unittest.mock import Mock
 
 from com_redhat_kdump import common
+from .mock import MockBuiltinRead
 from com_redhat_kdump.constants import KDUMP
 from com_redhat_kdump.service.kdump import KdumpService
 from com_redhat_kdump.service.kdump_interface import KdumpInterface
@@ -48,7 +50,15 @@ def test_fadump_enabled(self):
         self._check_properties_changed("FadumpEnabled", True)
         self.assertEqual(self._interface.FadumpEnabled, True)
 
-    def test_reserved_memory(self):
+    @patch("com_redhat_kdump.service.kdump.KdumpService.check_reserved_memory", return_value="256")
+    def test_reserved_memory(self, _mock_read):
         self._interface.ReservedMemory = "256"
         self._check_properties_changed("ReservedMemory", "256")
         self.assertEqual(self._interface.ReservedMemory, "256")
+
+    @patch("com_redhat_kdump.common.getMemoryBounds", return_value=(500, 800, 1))
+    def test_check_reserved_memory(self, _mock_read):
+        self._service._lower , self._service._upper, self._service._step = common.getMemoryBounds()
+        self.assertEqual(self._service.check_reserved_memory("900"), "800")
+        self.assertEqual(self._service.check_reserved_memory("400"), "500")
+        self.assertEqual(self._service.check_reserved_memory("600"), "600")
\ No newline at end of file
diff --git a/test/unit_tests/test_kickstart.py b/test/unit_tests/test_kickstart.py
index 746c242..4f063de 100644
--- a/test/unit_tests/test_kickstart.py
+++ b/test/unit_tests/test_kickstart.py
@@ -1,6 +1,8 @@
 from textwrap import dedent
 from unittest.case import TestCase
+from unittest.mock import patch
 from com_redhat_kdump import common
+from .mock import MockBuiltinRead
 from com_redhat_kdump.service.kdump import KdumpService
 
 
@@ -68,7 +70,10 @@ def test_ks_disable(self):
         %end
         """)
 
-    def test_ks_reserve_mb(self):
+    @patch("com_redhat_kdump.common.getMemoryBounds", return_value=(160, 800, 1))
+    def test_ks_reserve_mb(self, _mock_read):
+        self._service._lower , self._service._upper, self._service._step = common.getMemoryBounds()
+        self.assertEqual((self._service._lower , self._service._upper), (160, 800))
         self._check_ks_input("""
         %addon com_redhat_kdump --enable --reserve-mb=256
         %end