diff --git a/base/nmh:dev b/base/nmh:dev
index beacf22fab743feba1693ec67e80481433a62dcc..0c77c0c5df25d8085af8ba3e437b44fa94d255be 100644
--- a/base/nmh:dev
+++ b/base/nmh:dev
@@ -1,4 +1,4 @@
 FROM docker.km3net.de/jpp-root6-py2:v11.0.0-rc8
  MAINTAINER Tamas Gal <tgal@km3net.de>
  
- RUN git clone https://github.com/joaoabcoelho/OscProb /OscProb && cd /OscProb && make
+ RUN git clone https://github.com/joaoabcoelho/OscProb /OscProb && source /opt/root-6.14.06/bin/thisroot.sh && cd /OscProb && make