diff --git a/core/api/src/main/java/org/onlab/onos/net/provider/ProviderId.java b/core/api/src/main/java/org/onlab/onos/net/provider/ProviderId.java
index a945354..e9af0eb 100644
--- a/core/api/src/main/java/org/onlab/onos/net/provider/ProviderId.java
+++ b/core/api/src/main/java/org/onlab/onos/net/provider/ProviderId.java
@@ -9,6 +9,7 @@
  */
 public class ProviderId {
 
+    private final String scheme;
     private final String id;
 
     /**
@@ -16,15 +17,26 @@
      * The providers are expected to follow the reverse DNS convention, e.g.
      * {@code org.onlab.onos.provider.of.device}
      *
-     * @param id string identifier
+     * @param scheme device URI scheme to which this provider is bound, e.g. "of", "snmp"
+     * @param id     string identifier
      */
-    public ProviderId(String id) {
+    public ProviderId(String scheme, String id) {
+        this.scheme = scheme;
         this.id = id;
     }
 
+    /**
+     * Returns the device URI scheme to which this provider is bound.
+     *
+     * @return device URI scheme
+     */
+    public String scheme() {
+        return scheme;
+    }
+
     @Override
     public int hashCode() {
-        return Objects.hash(id);
+        return Objects.hash(scheme, id);
     }
 
     @Override
@@ -36,12 +48,13 @@
             return false;
         }
         final ProviderId other = (ProviderId) obj;
-        return Objects.equals(this.id, other.id);
+        return Objects.equals(this.scheme, other.scheme) &&
+                Objects.equals(this.id, other.id);
     }
 
     @Override
     public String toString() {
-        return toStringHelper(this).add("id", id).toString();
+        return toStringHelper(this).add("scheme", scheme).add("id", id).toString();
     }
 
 }