diff --git a/android/src/io/anuke/mindustry/AndroidLauncher.java b/android/src/io/anuke/mindustry/AndroidLauncher.java
index 6b971c5447..3f9b6bf143 100644
--- a/android/src/io/anuke/mindustry/AndroidLauncher.java
+++ b/android/src/io/anuke/mindustry/AndroidLauncher.java
@@ -115,6 +115,8 @@ public class AndroidLauncher extends AndroidApplication{
 								+ Character.digit(s.charAt(i + 1), 16));
 					}
 
+					if(new String(Base64Coder.encode(data)).equals("AAAAAAAAAOA=")) throw new RuntimeException("Bad UUID.");
+
 					return data;
 				}catch (Exception e){
                     Settings.defaults("uuid", "");
diff --git a/core/assets/version.properties b/core/assets/version.properties
index 68dd48f5aa..97e15ad1ee 100644
--- a/core/assets/version.properties
+++ b/core/assets/version.properties
@@ -1,7 +1,7 @@
 #Autogenerated file. Do not modify.
-#Sat Apr 14 21:55:24 EDT 2018
+#Sun Apr 15 15:52:41 EDT 2018
 version=release
-androidBuildCode=514
+androidBuildCode=516
 name=Mindustry
 code=3.5
 build=custom build