diff --git a/fedora b/fedora
index be93bb1..aa2c2ef 100644
--- a/fedora
+++ b/fedora
@@ -33,7 +33,7 @@ RUN if [ "${INTEL}" = "yes" ]; then \
 fi
 
 RUN useradd -m -G wheel -u 1001 votca
-RUN sed -i -e '/[^#].*wheel/s/^/# /' -e /wheel.*NOPASSWD/s/^# //' /etc/sudoers
+RUN sed -i -e '/[^#].*wheel/s/^/# /' -e '/wheel.*NOPASSWD/s/^# //' /etc/sudoers
 RUN cat /etc/sudoers
 
 USER votca