diff --git a/scripts/suppack-install.py b/scripts/suppack-install.py
index 425bdb1..5bd5608 100644
--- a/scripts/suppack-install.py
+++ b/scripts/suppack-install.py
@@ -135,14 +135,22 @@ def md5sum_file(fname):
     pkg_ver, _ = subprocess.Popen(['rpm', '--nosignature', '-q', '--qf', '%{VERSION}-%{RELEASE}',
                                     '-p', p.filename], stdout=subprocess.PIPE,
                                    stderr=subprocess.PIPE).communicate()
-    if 'options' in p.__dict__:
-        install = '-i' in p.options
-    else:
-        install = (pkg_name in ['kernel-xen', 'kernel-kdump'])
     s = subprocess.Popen(['rpm', '--nosignature', '-q', '--qf', '%{VERSION}-%{RELEASE}',
                           pkg_name], stdout=subprocess.PIPE,
                          stderr=subprocess.PIPE)
     inst_ver, _ = s.communicate()
+
+    if 'options' in p.__dict__:
+        install = False
+        if '-i' in p.options:
+            install = True
+        elif '-m' in p.options:
+            # kernel module, if it exists upgrade, else install
+            if s.returncode != 0:
+                install = True
+    else:
+        install = (pkg_name in ['kernel-xen', 'kernel-kdump'])
+
     if s.returncode != 0:
         if install:
             install_list.append(p)
diff --git a/xcp/supplementalpack.py b/xcp/supplementalpack.py
index 00f8cc1..45b1bc8 100644
--- a/xcp/supplementalpack.py
+++ b/xcp/supplementalpack.py
@@ -74,7 +74,10 @@ def __init__(self, fname):
                 if m:
                     self.label = m.group(1)
                     self.kernel = m.group(3) + m.group(2)
-                    self.options = '-i'
+                    # this is a kernel module. Multiple packages of this module
+                    # can be installed for different kernel versions. But for
+                    # the same kernel version, only upgrade should be done.
+                    self.options = '-m'
                 else:
                     self.label = rpmname
                     self.kernel = 'any'