3 files changed, 7 insertions, 1 deletions
diff --git a/Doxyfile b/Doxyfile
index 3a626fa..4b43fe4 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "args"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 6.0.1
+PROJECT_NUMBER         = 6.0.2
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/args.hxx b/args.hxx
index 7be2305..da93fa1 100644
--- a/args.hxx
+++ b/args.hxx
@@ -25,6 +25,9 @@
  * The important stuff is done inside the args namespace
  */
 
+#ifndef ARGS_HXX
+#define ARGS_HXX
+
 #include <algorithm>
 #include <exception>
 #include <functional>
@@ -2051,3 +2054,5 @@ namespace args
             }
     };
 }
+
+#endif
diff --git a/test.cxx b/test.cxx
index ad3bfd8..c7dbb8b 100644
--- a/test.cxx
+++ b/test.cxx
@@ -570,6 +570,7 @@ TEST_CASE("Kick-out should work via all flags and value flags", "[args]")
     REQUIRE(d3);
 }
 
+#undef ARGS_HXX
 #define ARGS_TESTNAMESPACE
 #define ARGS_NOEXCEPT
 #include <args.hxx>