diff --git a/dev/gammalib-activate.sh b/dev/gammalib-activate.sh
index 9ba0e17..68986a5 100644
--- a/dev/gammalib-activate.sh
+++ b/dev/gammalib-activate.sh
@@ -1,4 +1,4 @@
 #!/bin/sh
 
 export GAMMALIB=${CONDA_PREFIX}
-
+source ${GAMMALIB}/bin/gammalib-init.sh