diff --git a/build-update-package b/build-update-package
index 57705ade81e5a18866a35a04889bb6b8a1a16ad6..de499aaece669418e125cb696d48caac6296c5dd 100755
--- a/build-update-package
+++ b/build-update-package
@@ -71,6 +71,12 @@ cd "${AGENTDIR}"
 # Check all MD5 files
 printf "Checking SEED2-run files integrity... "
 
+if ! test -d "${MD5DIR}"; then
+    printf "ERROR (5): There is no MD5 directory. Please, run create %b"
+           "integrity.\n"
+    exit 5
+fi
+
 for FILE in $(find "${MD5DIR}" -type f); do
     if ! check_file_integrity "${FILE}"; then
         printf "ERROR (3): File(s) corrupted. Please, re-create integrity or %b"