diff --git a/template/script.sh.erb b/template/script.sh.erb
index 6c50123420556e8da0cf3f726870e93a18f0dd70..4bce4da020b2133e7ab955db30aa27ef87d26cc8 100755
--- a/template/script.sh.erb
+++ b/template/script.sh.erb
@@ -40,7 +40,7 @@ echo "Display: ${DISPLAY}"
 
 # Launch PyCharm
 set -x
-cmd="singularity exec --env \"DISPLAY:$DISPLAY\" -B \"/tmp/.X11-unix:/tmp/.X11-unix\" \
+cmd="singularity exec --env \"DISPLAY=$DISPLAY\" -B \"/tmp/.X11-unix:/tmp/.X11-unix\" \
     <%= context.extra_singularity_args %> \
     <%= context.container_path %> \
     pycharm"