diff --git a/dots/bin/importGnupgKeys.sh b/dots/bin/importGnupgKeys.sh
index 8a6e0e3..20d6938 100755
--- a/dots/bin/importGnupgKeys.sh
+++ b/dots/bin/importGnupgKeys.sh
@@ -8,6 +8,16 @@ tmp_dir=/tmp
 this_file_name=`basename "$0"`
 echo "$this_file_name"
 
+if [ ! -d ${src_dir} ]; then
+    echo "error: missing directory '${src_dir}'"
+    exit 1
+fi
+
+if [ ! -d ${tmp_dir} ]; then
+    echo "error: missing directory '${tmp_dir}'"
+    exit 1
+fi
+
 echo "please, remember the hint: bibL2"
 
 # copy .zip.gpg to tmp dir