diff --git a/wremnants/__init__.py b/wremnants/__init__.py
index 8f7e7e6bd..7c81ecd8a 100644
--- a/wremnants/__init__.py
+++ b/wremnants/__init__.py
@@ -6,6 +6,7 @@
 
 ROOT.gInterpreter.AddIncludePath(f"{pathlib.Path(__file__).parent}/include/")
 
+narf.clingutils.Load("libHist")
 
 narf.clingutils.Declare('#include "muonCorr.h"')
 narf.clingutils.Declare('#include "histoScaling.h"')