diff --git a/Detectors/TPC/calibration/src/TPCCalibrationLinkDef.h b/Detectors/TPC/calibration/src/TPCCalibrationLinkDef.h
index b668c8b67ca4f..dc0ca76f8a208 100644
--- a/Detectors/TPC/calibration/src/TPCCalibrationLinkDef.h
+++ b/Detectors/TPC/calibration/src/TPCCalibrationLinkDef.h
@@ -126,7 +126,7 @@
 
 #pragma link C++ class o2::tpc::CMVPerTF + ;
 #pragma link C++ class o2::tpc::CMVPerInterval + ;
-#pragma link C++ class std::vector<o2::tpc::CMVPerTF> + ;
-#pragma link C++ class std::vector<std::vector<float>>+;
+#pragma link C++ class std::vector < o2::tpc::CMVPerTF> + ;
+#pragma link C++ class std::vector < std::vector < float>> + ;
 
 #endif