diff --git a/prepare-build.sh b/prepare-build.sh
index ef0a467..8af69e8 100755
--- a/prepare-build.sh
+++ b/prepare-build.sh
@@ -11,8 +11,8 @@ then
     exit 1
 fi
 
-export DEBFULLNAME=${DEBFULLNAME:-FlightAware build automation}
-export DEBEMAIL=${DEBEMAIL:-adsb-devs@flightaware.com}
+export DEBFULLNAME="${DEBFULLNAME:-FlightAware build automation}"
+export DEBEMAIL="${DEBEMAIL:-adsb-devs@flightaware.com}"
 
 TOP=`dirname $0`
 DIST=$1