diff --git a/src/options.cpp b/src/options.cpp
index c10e070..791cb11 100644
--- a/src/options.cpp
+++ b/src/options.cpp
@@ -68,8 +68,8 @@ po::variables_map parse_options(int argc, char *argv[])
          translate("Use additional PATTERN for matching.").str().data())
         ("raw,a",
          translate("Do not strip HTML before searching.").str().data())
-        ("context,C", po::value<std::vector<std::uint64_t>>()
-         ->value_name(translate("NUM")),
+        ("context,C", po::value<std::uint64_t>()
+         ->value_name(translate("NUM"))->default_value(0),
          translate("Print NUM words of context around matches.").str().data())
     ;