diff --git a/plugins/libvirt/kvm_cpu b/plugins/libvirt/kvm_cpu
index c9cad306..ff696fc7 100755
--- a/plugins/libvirt/kvm_cpu
+++ b/plugins/libvirt/kvm_cpu
@@ -68,7 +68,7 @@ def find_vm_names(pids):
     result = {}
     for pid in pids:
         cmdline = open("/proc/%s/cmdline" % pid, "r")
-        result[pid] = clean_vm_name(re.sub(r"^.*-name\x00([a-zA-Z0-9.-_-]*)\x00\-.*$",r"\1", cmdline.readline()))
+        result[pid] = clean_vm_name(re.sub(r"^.*guest=([a-zA-Z0-9.-_-]*).*$",r"\1", cmdline.readline()))
     return result
 
 def list_pids():
diff --git a/plugins/libvirt/kvm_io b/plugins/libvirt/kvm_io
index 972f4983..0e0cc386 100755
--- a/plugins/libvirt/kvm_io
+++ b/plugins/libvirt/kvm_io
@@ -85,7 +85,7 @@ def find_vm_names(pids):
     result = {}
     for pid in pids:
         cmdline = open("/proc/%s/cmdline" % pid, "r")
-        result[pid] = clean_vm_name(re.sub(r"^.*-name\x00([a-zA-Z0-9.-_-]*)\x00\-.*$",r"\1", cmdline.readline()))
+        result[pid] = clean_vm_name(re.sub(r"^.*guest=([a-zA-Z0-9.-_-]*).*$",r"\1", cmdline.readline()))
     return result
 
 def list_pids():
diff --git a/plugins/libvirt/kvm_mem b/plugins/libvirt/kvm_mem
index 7e8d2793..aeb1af7e 100755
--- a/plugins/libvirt/kvm_mem
+++ b/plugins/libvirt/kvm_mem
@@ -82,7 +82,7 @@ def find_vm_names(pids):
     result = {}
     for pid in pids:
         cmdline = open("/proc/%s/cmdline" % pid, "r")
-        result[pid] = clean_vm_name(re.sub(r"^.*-name\x00([a-zA-Z0-9.-_-]*)\x00\-.*$",r"\1", cmdline.readline()))
+        result[pid] = clean_vm_name(re.sub(r"^.*guest=([a-zA-Z0-9.-_-]*).*$",r"\1", cmdline.readline()))
     return result
 
 def list_pids():