diff --git a/xwords4/common/comtypes.h b/xwords4/common/comtypes.h
index 9068788ef..1d7407f04 100644
--- a/xwords4/common/comtypes.h
+++ b/xwords4/common/comtypes.h
@@ -72,8 +72,10 @@ typedef enum {
  * already have the notion of per-game and all-game prefs.
  */
 typedef struct CommonPrefs {
-    XP_Bool         showBoardArrow; /* applies to all games */
-    XP_Bool         showRobotScores;  /* applies to all games */
+    XP_Bool         showBoardArrow;  /* applies to all games */
+    XP_Bool         showRobotScores; /* applies to all games */
+    XP_Bool         reserved1;       /* get to 32-bit for ARM... */
+    XP_Bool         reserved2;
 } CommonPrefs;
 
 /* used for all vtables */
diff --git a/xwords4/palm/palmmain.h b/xwords4/palm/palmmain.h
index c7d7dcfd7..bfaa112d1 100644
--- a/xwords4/palm/palmmain.h
+++ b/xwords4/palm/palmmain.h
@@ -117,10 +117,14 @@ typedef struct XWords4PreferenceType {
     Boolean showProgress;
     Boolean showGrid;
     Boolean showColors;
-#ifndef DEBUG_OFF
+#ifdef DEBUG
     Boolean showDebugstrs;
     Boolean windowAvail;
     Boolean logToMemo;
+    Boolean reserved1;
+    Boolean reserved2;
+#else
+    Boolean reserved1;
 #endif
     /* New for 0x0405 */
     CommonPrefs cp;