diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0206f22ab..87a0dc53b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,8 @@ it in future.
 * chore: trim trailing whitespace
 * Fix mismatch dimension cavern ECN3 TCC8
 * fix: use standard library to expand env
+* Compatibility with ROOT 6.32, including an external TPythia6 package (not supported anymore by ROOT).
+
 
 ### Changed
 
diff --git a/macro/makeCascade.py b/macro/makeCascade.py
index 0273cae9b..d15637ab0 100644
--- a/macro/makeCascade.py
+++ b/macro/makeCascade.py
@@ -287,7 +287,7 @@ def fillp1(hist):
          if stack[nstack][0]==idhist[i]:
             idpn=0
 #   decide on p or n target in Mo
-            if random.random>fracp: idpn=1
+            if random.random()>fracp: idpn=1
             idw=i*10+idpn*4+4
             ib=h[str(idw)].FindBin(ptot,0.,0.)
             prbsig=h[str(idw)].GetBinContent(ib)
diff --git a/macro/run_simScript.py b/macro/run_simScript.py
index 24d79090b..4ffc76143 100755
--- a/macro/run_simScript.py
+++ b/macro/run_simScript.py
@@ -2,6 +2,7 @@
 import os
 import sys
 import ROOT
+ROOT.gSystem.Load('libEGPythia6')
 ROOT.gSystem.Load('libEGPythia8')
 
 import shipunit as u
diff --git a/muonShieldOptimization/makeMuonDIS.py b/muonShieldOptimization/makeMuonDIS.py
index 7337abfee..2440b38c9 100644
--- a/muonShieldOptimization/makeMuonDIS.py
+++ b/muonShieldOptimization/makeMuonDIS.py
@@ -1,4 +1,8 @@
 import ROOT,time,os,sys
+
+ROOT.gROOT.LoadMacro("$VMCWORKDIR/gconfig/basiclibs.C")
+ROOT.basiclibs()
+
 nJob   = 2
 nMult  = 10 # number of events / muon
 muonIn = '$SHIPSOFT/data/muConcrete.root'
diff --git a/shipgen/CMakeLists.txt b/shipgen/CMakeLists.txt
index cd41804ca..f3caa80d7 100644
--- a/shipgen/CMakeLists.txt
+++ b/shipgen/CMakeLists.txt
@@ -8,6 +8,7 @@ ${CMAKE_SOURCE_DIR}/generators
 ${CMAKE_SOURCE_DIR}/shipdata
 ${CMAKE_SOURCE_DIR}/veto
 ${genfit2_INCDIR}
+${TPYTHIA6_INCLUDE_DIR}
 )
 
 set(SYSTEM_INCLUDE_DIRECTORIES