diff --git a/userspace/ksud/src/installer.sh b/userspace/ksud/src/installer.sh
index 5e3621f9..2d23d679 100644
--- a/userspace/ksud/src/installer.sh
+++ b/userspace/ksud/src/installer.sh
@@ -278,7 +278,9 @@ mark_remove() {
 }
 
 mark_replace() {
-  mkdir -p ${1%/*} 2>/dev/null
+  # REPLACE must be directory!!!
+  # https://docs.kernel.org/filesystems/overlayfs.html#whiteouts-and-opaque-directories
+  mkdir -p $1 2>/dev/null
   setfattr -n trusted.overlay.opaque -v y $1
   chmod 644 $1
 }