diff --git a/core/jni/android_net_wifi_Wifi.cpp b/core/jni/android_net_wifi_Wifi.cpp
index fb029e6e17134..35d8dc3eea5ea 100644
--- a/core/jni/android_net_wifi_Wifi.cpp
+++ b/core/jni/android_net_wifi_Wifi.cpp
@@ -402,7 +402,9 @@ static jint android_net_wifi_getPowerModeCommand(JNIEnv* env, jobject clazz)
     }
     // reply comes back in the form "powermode = XX" where XX is the
     // number we're interested in.
-    sscanf(reply, "%*s = %u", &power);
+    if (sscanf(reply, "%*s = %u", &power) != 1) {
+        return (jint)-1;
+    }
     return (jint)power;
 }