diff --git a/toolkit/crashreporter/tools/upload_symbols.sh b/toolkit/crashreporter/tools/upload_symbols.sh
index abc1e53dec1e..32de90299330 100755
--- a/toolkit/crashreporter/tools/upload_symbols.sh
+++ b/toolkit/crashreporter/tools/upload_symbols.sh
@@ -49,10 +49,10 @@ set -e
 : ${SYMBOL_SERVER_HOST?} ${SYMBOL_SERVER_USER?} ${SYMBOL_SERVER_PATH?} ${1?"You must specify a symbol archive to upload"}
 archive=`basename $1`
 echo "Transferring symbols... $1"
-scp -v ${SYMBOL_SERVER_SSH_KEY:+-i $SYMBOL_SERVER_SSH_KEY} $1 \
+scp -v ${SYMBOL_SERVER_SSH_KEY:+-i "$SYMBOL_SERVER_SSH_KEY"} $1 \
   ${SYMBOL_SERVER_USER}@${SYMBOL_SERVER_HOST}:${SYMBOL_SERVER_PATH}/
 echo "Unpacking symbols on remote host..."
-ssh -2 ${SYMBOL_SERVER_SSH_KEY:+-i $SYMBOL_SERVER_SSH_KEY} \
+ssh -2 ${SYMBOL_SERVER_SSH_KEY:+-i "$SYMBOL_SERVER_SSH_KEY"} \
   -l ${SYMBOL_SERVER_USER} ${SYMBOL_SERVER_HOST} \
   "set -e;
    umask 0022;