diff --git a/ibm_vpd_app.cpp b/ibm_vpd_app.cpp
index c6e58e6..adf68f0 100644
--- a/ibm_vpd_app.cpp
+++ b/ibm_vpd_app.cpp
@@ -311,6 +311,12 @@
                     }
                 }
             }
+            else if (itr.value().is_number())
+            {
+                // For now assume the value is a size_t.  In the future it would
+                // be nice to come up with a way to get the type from the JSON.
+                props.emplace(busProp, itr.value().get<size_t>());
+            }
         }
         interfaces.emplace(inf, move(props));
     }