diff --git a/channels/drive/client/drive_main.c b/channels/drive/client/drive_main.c
index 12d4d89f7..36f2f08df 100644
--- a/channels/drive/client/drive_main.c
+++ b/channels/drive/client/drive_main.c
@@ -795,8 +795,7 @@ int DeviceServiceEntry(PDEVICE_SERVICE_ENTRY_POINTS pEntryPoints)
 			if (*dev > 'B')
                         {
 				/* Suppress disk drives A and B to avoid pesty messages */
-				_snprintf(buf, sizeof(buf) - 4, "%s", drive->Name);
-				len = strlen(buf);
+				len = _snprintf(buf, sizeof(buf) - 4, "%s", drive->Name);
 				buf[len] = '_';
 				buf[len + 1] = dev[0];
 				buf[len + 2] = 0;