diff --git a/build.sh b/build.sh
index 067768b..98c7e92 100644
--- a/build.sh
+++ b/build.sh
@@ -3,7 +3,7 @@
 set -e 
 set -x
 
-if [ -z "${RPI}" ] ; do
+if [ -z "${RPI}" ] ; then
   echo "${RPI} missing, exting"
   exit 1
 fi