diff --git a/src/calibre/devices/mtp/windows/content_enumeration.cpp b/src/calibre/devices/mtp/windows/content_enumeration.cpp
index 7e1cc09731..584a8ecff5 100644
--- a/src/calibre/devices/mtp/windows/content_enumeration.cpp
+++ b/src/calibre/devices/mtp/windows/content_enumeration.cpp
@@ -278,7 +278,7 @@ bulk_get_filesystem(
 		return false;
 	}
 
-	bulk_properties_callback->AddRef();
+    bulk_properties_callback->AddRef();
     while (!PyErr_Occurred()) {
 		DWORD wait_result = bulk_properties_callback->wait_for_messages();
         if (wait_result == WAIT_OBJECT_0) {
@@ -294,12 +294,12 @@ bulk_get_filesystem(
             PyErr_SetString(WPDError, "An unknown error occurred (mutex abandoned)");
         } else {
             // The wait failed for some reason
-			const char buf[256] = {0};
-			_snprintf_s((char *const)buf, sizeof(buf) - 1, _TRUNCATE, "handle wait failed in bulk filesystem get at file: %s line: %d", __FILE__, __LINE__);
-			PyErr_SetExcFromWindowsErrWithFilename(WPDError, 0, buf);
+            const char buf[256] = {0};
+            _snprintf_s((char *const)buf, sizeof(buf) - 1, _TRUNCATE, "handle wait failed in bulk filesystem get at file: %s line: %d", __FILE__, __LINE__);
+            PyErr_SetExcFromWindowsErrWithFilename(WPDError, 0, buf);
         }
     }
-	bulk_properties_callback->end_processing();
+    bulk_properties_callback->end_processing();
     if (PyErr_Occurred()) {
         bulk_properties->Cancel(guid_context);
         pump_waiting_messages();