diff --git a/Source/cmProjectCommand.h b/Source/cmProjectCommand.h
index 6ca8716ad..0deeacb59 100644
--- a/Source/cmProjectCommand.h
+++ b/Source/cmProjectCommand.h
@@ -72,7 +72,7 @@ public:
   virtual const char* GetFullDocumentation()
     {
     return
-      "  PROJECT(projectname [C++] [C] [Java])\n"
+      "  PROJECT(projectname [CXX] [C] [Java])\n"
       "Sets the name of the project.  "
       "This creates the variables projectname_BINARY_DIR and projectname_SOURCE_DIR.  "
       "Optionally you can specify which languages your project supports.  "