diff --git a/core/base/utils/CbmMcbmUtils.cxx b/core/base/utils/CbmMcbmUtils.cxx
index 7327fd5606fa9d1a9bded13644ca74e618101ced..f30fd5ddb74557eaa83a2dc1b612b50967a32b5d 100644
--- a/core/base/utils/CbmMcbmUtils.cxx
+++ b/core/base/utils/CbmMcbmUtils.cxx
@@ -6,7 +6,7 @@ gh /* Copyright (C) 2022 Facility for Antiproton and Ion Research in Europe, Dar
 
 #include <stdexcept>
 
-namespace cbm
+  namespace cbm
 {
   namespace mcbm
   {