diff --git a/ci/build-all-defconfigs.sh b/ci/build-all-defconfigs.sh
index 096ffbe..f60217e 100755
--- a/ci/build-all-defconfigs.sh
+++ b/ci/build-all-defconfigs.sh
@@ -68,7 +68,7 @@
 	export BR2_DL_DIR=${DL_DIR}
 fi
 
-if [ -f $(ldconfig -p | grep libeatmydata.so | tr ' ' '\n' | grep /|head -n1) ]; then
+if [ -f "$(ldconfig -p | grep libeatmydata.so | tr ' ' '\n' | grep /|head -n1)" ]; then
     export LD_PRELOAD=${LD_PRELOAD:+"$LD_PRELOAD "}libeatmydata.so
 fi