diff --git a/suspend-fix/install.sh b/suspend-fix/install.sh
index addeb3a..e5235e5 100755
--- a/suspend-fix/install.sh
+++ b/suspend-fix/install.sh
@@ -51,7 +51,7 @@ install_dropin() {
 
 if [ "${BASH_SOURCE[0]}" = "$0" ]; then
 	for pid in "${MM_PIDS[@]}"; do
-		if [ -n $(lspci -d ":$pid")" ]; then
+		if [ -n "$(lspci -d ":$pid")" ]; then
 			echo "Found PCI ID $pid, installing the ModemManager drop-in override"
 			install_dropin
 			exit