diff --git a/include/xo/numeric/numeric_register_primitives.hpp b/include/xo/numeric/numeric_register_primitives.hpp
index c4b0bd7b..5c68a51d 100644
--- a/include/xo/numeric/numeric_register_primitives.hpp
+++ b/include/xo/numeric/numeric_register_primitives.hpp
@@ -11,8 +11,9 @@
 namespace xo {
     namespace scm {
         /** Register primitive factories with primitive registry **/
-        bool numeric_register_primitives(obj<xo::mm::AAllocator> mm,
-                                         StringTable * stbl,
+        bool numeric_register_primitives(obj<ARuntimeContext> rcx,
+                                         //obj<xo::mm::AAllocator> mm,
+                                         //StringTable * stbl,
                                          InstallSink sink,
                                          InstallFlags flags);
     }
diff --git a/src/numeric/numeric_register_primitives.cpp b/src/numeric/numeric_register_primitives.cpp
index 6150df9f..08cb0fc9 100644
--- a/src/numeric/numeric_register_primitives.cpp
+++ b/src/numeric/numeric_register_primitives.cpp
@@ -51,10 +51,12 @@ namespace xo {
         }
 
         bool
-        numeric_register_primitives(obj<AAllocator> mm, StringTable * stbl,
+        numeric_register_primitives(obj<ARuntimeContext> rcx,
+                                    //obj<AAllocator> mm, StringTable * stbl,
                                     InstallSink sink, InstallFlags flags)
         {
-            (void)stbl;
+            obj<AAllocator> mm = rcx.allocator();
+            StringTable * stbl = rcx.stringtable();
 
             scope log(XO_DEBUG(true));