diff --git a/xwords4/android/XWords4/src/org/eehouse/android/xw4/DbgUtils.java b/xwords4/android/XWords4/src/org/eehouse/android/xw4/DbgUtils.java
index 971abf66a..c7c24a3dc 100644
--- a/xwords4/android/XWords4/src/org/eehouse/android/xw4/DbgUtils.java
+++ b/xwords4/android/XWords4/src/org/eehouse/android/xw4/DbgUtils.java
@@ -43,7 +43,7 @@ import junit.framework.Assert;
 import org.eehouse.android.xw4.loc.LocUtils;
 
 public class DbgUtils {
-    private static final String TAG = "XW4";
+    private static final String TAG = BuildConstants.DBG_TAG;
     private static boolean s_doLog = BuildConfig.DEBUG;
 
     private static Time s_time = new Time();
diff --git a/xwords4/android/scripts/genvers.sh b/xwords4/android/scripts/genvers.sh
index 0a828d42e..6a7ab7cb5 100755
--- a/xwords4/android/scripts/genvers.sh
+++ b/xwords4/android/scripts/genvers.sh
@@ -27,11 +27,13 @@ case $VARIANT in
 		APPNAME=Crosswords
 		SMSPORT=3344
 		INVITE_PREFIX=/and/
+		DBG_TAG=XW4
 		;;
 	xw4dbg)
 		APPNAME=CrossDbg
 		SMSPORT=3345
 		INVITE_PREFIX=/anddbg/
+		DBG_TAG=X4BG
 		;;
 	*)
 		usage
@@ -75,6 +77,7 @@ class BuildConstants {
     public static final boolean CHAT_SUPPORTED = $CHAT_SUPPORTED;
     public static final boolean THUMBNAIL_SUPPORTED = $THUMBNAIL_SUPPORTED;
     public static final long BUILD_STAMP = $(date +'%s');
+    public static final String DBG_TAG = "$DBG_TAG";
 }
 EOF