diff --git a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtPatchSystemVmCommandWrapper.java b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtPatchSystemVmCommandWrapper.java
index 81a48d796fe4..2c8918e620dd 100644
--- a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtPatchSystemVmCommandWrapper.java
+++ b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtPatchSystemVmCommandWrapper.java
@@ -77,7 +77,7 @@ public Answer execute(PatchSystemVmCommand cmd, LibvirtComputingResource serverR
         if (patchResult.first()) {
             String scriptVersion = lines[1];
             if (StringUtils.isNotEmpty(patchResult.second())) {
-                s_logger.debug(String.format("Patch result of systemVM %s: %s", sysVMName, patchResult.second()));
+                logger.debug("Patch result of systemVM {}: {}", sysVMName, patchResult.second());
                 String res = patchResult.second().replace("\n", " ");
                 String[] output = res.split(":");
                 if (output.length != 2) {