diff --git a/src/cryfs/cli/program_options/utils.cpp b/src/cryfs/cli/program_options/utils.cpp
index 2c2f0d2d..4ea052f9 100644
--- a/src/cryfs/cli/program_options/utils.cpp
+++ b/src/cryfs/cli/program_options/utils.cpp
@@ -15,7 +15,9 @@ namespace cryfs {
             vector<char*> afterDoubleDash;
             afterDoubleDash.reserve(options.size()-beforeDoubleDash.size()+1);
             afterDoubleDash.push_back(options[0]);
-            std::copy(doubleDashIterator+1, options.end(), std::back_inserter(afterDoubleDash));
+            if (options.end() >= doubleDashIterator+1) {
+                std::copy(doubleDashIterator + 1, options.end(), std::back_inserter(afterDoubleDash));
+            }
             return make_pair(
                     beforeDoubleDash,
                     afterDoubleDash