diff --git a/staticlibs/device/android/net/NetworkFactoryImpl.java b/staticlibs/device/android/net/NetworkFactoryImpl.java
index 439ea14..9c1190c 100644
--- a/staticlibs/device/android/net/NetworkFactoryImpl.java
+++ b/staticlibs/device/android/net/NetworkFactoryImpl.java
@@ -315,9 +315,8 @@
     }
 
     @Override public String toString() {
-        return "providerId="
-                + mProvider.getProviderId() + ", ScoreFilter="
-                + mScore + ", Filter=" + mCapabilityFilter + ", requests="
-                + mNetworkRequests.size();
+        return "providerId=" + (mProvider != null ? mProvider.getProviderId() : "null")
+                + ", ScoreFilter=" + mScore + ", Filter=" + mCapabilityFilter
+                + ", requests=" + mNetworkRequests.size();
     }
 }
diff --git a/staticlibs/device/android/net/NetworkFactoryLegacyImpl.java b/staticlibs/device/android/net/NetworkFactoryLegacyImpl.java
index 6dd0adb..6cba625 100644
--- a/staticlibs/device/android/net/NetworkFactoryLegacyImpl.java
+++ b/staticlibs/device/android/net/NetworkFactoryLegacyImpl.java
@@ -390,9 +390,8 @@
     }
 
     @Override public String toString() {
-        return "providerId="
-                + mProvider.getProviderId() + ", ScoreFilter="
-                + mScore + ", Filter=" + mCapabilityFilter + ", requests="
-                + mNetworkRequests.size();
+        return "providerId=" + (mProvider != null ? mProvider.getProviderId() : "null")
+                + ", ScoreFilter=" + mScore + ", Filter=" + mCapabilityFilter
+                + ", requests=" + mNetworkRequests.size();
     }
 }