diff --git a/include/xo/jit/MachPipeline.hpp b/include/xo/jit/MachPipeline.hpp
index 8deede36..07fd6050 100644
--- a/include/xo/jit/MachPipeline.hpp
+++ b/include/xo/jit/MachPipeline.hpp
@@ -91,15 +91,17 @@ namespace xo {
              **/
             void machgen_current_module();
 
+            /** lookup symbol in jit-associated output library **/
             llvm::orc::ExecutorAddr lookup_symbol(const std::string & x);
 
             virtual void display(std::ostream & os) const;
             virtual std::string display_string() const;
 
         private:
-            MachPipeline(std::unique_ptr<Jit> jit);
+            /** construct instance, adopting jit for compilation+execution **/
+            explicit MachPipeline(std::unique_ptr<Jit> jit);
 
-            /* iniitialize native builder (i.e. for platform we're running on) */
+            /** iniitialize native builder (i.e. for platform we're running on) **/
             static void init_once();
 
             /** (re)create pipeline to turn expressions into llvm IR code **/
diff --git a/src/jit/MachPipeline.cpp b/src/jit/MachPipeline.cpp
index 02b27b00..68d8a127 100644
--- a/src/jit/MachPipeline.cpp
+++ b/src/jit/MachPipeline.cpp
@@ -35,7 +35,7 @@ namespace xo {
          *   can instantiate from python
          * + 'jit object layer'
          *   (realtime dynamic library object linking layer)
-         * + 'jit_copmile_layer'
+         * + 'jit_compile_layer'
          * + 'jit_our_dynamic_lib'
          */
         llvm::Expected<std::unique_ptr<MachPipeline>>