diff --git a/src/fuel_fab.h b/src/fuel_fab.h
index 1b96b48a71..8fc3ea3a7f 100644
--- a/src/fuel_fab.h
+++ b/src/fuel_fab.h
@@ -54,6 +54,7 @@ namespace cycamore {
 /// @endcode
 class FuelFab : public cyclus::Facility {
 #pragma cyclus note { \
+"niche": "fabrication", \
 "doc": \
   "FuelFab takes in 2 streams of material and mixes them in ratios in order to" \
   " supply material that matches some neutronics properties of reqeusted" \
diff --git a/src/separations.h b/src/separations.h
index da118ad6d4..f0cee6a025 100644
--- a/src/separations.h
+++ b/src/separations.h
@@ -35,6 +35,7 @@ cyclus::Material::Ptr SepMaterial(std::map<int, double> effs,
 /// room is again available in the output streams.
 class Separations : public cyclus::Facility {
 #pragma cyclus note { \
+  "niche": "separations", \
   "doc": \
     "Separations processes feed material into one or more streams containing" \
     " specific elements and/or nuclides.  It uses mass-based efficiencies." \