diff --git a/xwords4/common/comtypes.h b/xwords4/common/comtypes.h
index 5b07b7220..e4cfe0b30 100644
--- a/xwords4/common/comtypes.h
+++ b/xwords4/common/comtypes.h
@@ -237,7 +237,9 @@ typedef struct CommonPrefs {
 #ifdef XWFEATURE_CROSSHAIRS
     XP_Bool         hideCrosshairs;  /* applies to all games */
 #endif
+#ifdef XWFEATURE_ROBOTPHONIES
     XP_U16          makePhonyPct;
+#endif
 } CommonPrefs;
 
 typedef struct _PlayerDicts {
diff --git a/xwords4/common/model.c b/xwords4/common/model.c
index 958c52b70..55881394f 100644
--- a/xwords4/common/model.c
+++ b/xwords4/common/model.c
@@ -1255,8 +1255,10 @@ juggleMoveIfDebug( MoveInfo* move )
         }
     }
 }
+#endif
 
 /* Reverse the *letters on* the tiles */
+#ifdef XWFEATURE_ROBOTPHONIES
 void
 reverseTiles( MoveInfo* move )
 {
diff --git a/xwords4/common/server.c b/xwords4/common/server.c
index b2f3a6062..32da190b2 100644
--- a/xwords4/common/server.c
+++ b/xwords4/common/server.c
@@ -106,7 +106,9 @@ typedef struct ServerNonvolatiles {
     XP_U16 robotThinkMin, robotThinkMax;   /* not saved (yet) */
     XP_U16 robotTradePct;
 #endif
+#ifdef XWFEATURE_ROBOTPHONIES
     XP_U16 makePhonyPct;
+#endif
 
     RemoteAddress addresses[MAX_NUM_PLAYERS];
     XWStreamCtxt* prevMoveStream;     /* save it to print later */
@@ -625,7 +627,9 @@ server_prefsChanged( ServerCtxt* server, const CommonPrefs* cp )
     server->nv.robotThinkMax = cp->robotThinkMax;
     server->nv.robotTradePct = cp->robotTradePct;
 #endif
+#ifdef XWFEATURE_ROBOTPHONIES
     server->nv.makePhonyPct = cp->makePhonyPct;
+#endif
 } /* server_prefsChanged */
 
 XP_S16
@@ -1370,7 +1374,7 @@ makeRobotMove( ServerCtxt* server )
             /* if canMove is false, this is a fake move, a pass */
 
             if ( canMove || NPASSES_OK(server) ) {
-#ifdef DEBUG
+#ifdef XWFEATURE_ROBOTPHONIES
                 if ( server->nv.makePhonyPct > XP_RANDOM() % 100 ) {
                     reverseTiles( &newMove );
                 }
diff --git a/xwords4/linux/Makefile b/xwords4/linux/Makefile
index 0c7487e4f..9330bc0a8 100644
--- a/xwords4/linux/Makefile
+++ b/xwords4/linux/Makefile
@@ -161,7 +161,7 @@ DEFINES += -DXWFEATURE_SMS -DXWFEATURE_BASE64
 DEFINES += -DXWFEATURE_DIRECTIP
 
 # Robot can be made to think, to simulate for relay mostly
-DEFINES += -DXWFEATURE_SLOW_ROBOT
+DEFINES += -DXWFEATURE_SLOW_ROBOT -DXWFEATURE_ROBOTPHONIES
 
 DEFINES += -DXWFEATURE_DEVICE
 
diff --git a/xwords4/linux/cursesboard.c b/xwords4/linux/cursesboard.c
index d306d9260..496236c24 100644
--- a/xwords4/linux/cursesboard.c
+++ b/xwords4/linux/cursesboard.c
@@ -591,7 +591,9 @@ initNoDraw( CursesBoardState* cbState, sqlite3_int64 rowid,
     cGlobals->cp.robotThinkMax = params->robotThinkMax;
     cGlobals->cp.robotTradePct = params->robotTradePct;
 #endif
+#ifdef XWFEATURE_ROBOTPHONIES
     cGlobals->cp.makePhonyPct = params->makePhonyPct;
+#endif
 
     if ( linuxOpenGame( cGlobals, &result->procs, returnAddr ) ) {
          result = ref( result );
diff --git a/xwords4/linux/gtkboard.c b/xwords4/linux/gtkboard.c
index aadedff35..b0ee10fab 100644
--- a/xwords4/linux/gtkboard.c
+++ b/xwords4/linux/gtkboard.c
@@ -2372,7 +2372,9 @@ initGlobalsNoDraw( GtkGameGlobals* globals, LaunchParams* params,
     cGlobals->cp.robotThinkMax = params->robotThinkMax;
     cGlobals->cp.robotTradePct = params->robotTradePct;
 #endif
+#ifdef XWFEATURE_ROBOTPHONIES
     cGlobals->cp.makePhonyPct = params->makePhonyPct;
+#endif
 #ifdef XWFEATURE_CROSSHAIRS
     cGlobals->cp.hideCrosshairs = params->hideCrosshairs;
 #endif
diff --git a/xwords4/linux/linuxmain.c b/xwords4/linux/linuxmain.c
index 187391eed..7efa0b494 100644
--- a/xwords4/linux/linuxmain.c
+++ b/xwords4/linux/linuxmain.c
@@ -897,7 +897,9 @@ typedef enum {
     ,CMD_SLOWROBOT
     ,CMD_TRADEPCT
 #endif
+#ifdef XWFEATURE_ROBOTPHONIES
     ,CMD_MAKE_PHONY_PCT
+#endif
 #ifdef USE_GLIBLOOP		/* just because hard to implement otherwise */
     ,CMD_UNDOPCT
 #endif
@@ -1035,8 +1037,10 @@ static CmdInfoRec CmdInfoRecs[] = {
     ,{ CMD_SLOWROBOT, true, "slow-robot", "make robot slower to test network" }
     ,{ CMD_TRADEPCT, true, "trade-pct", "what pct of the time should robot trade" }
 #endif
+#ifdef XWFEATURE_ROBOTPHONIES
     ,{ CMD_MAKE_PHONY_PCT, true, "make-phony-pct",
        "what pct of the time should robot play a bad word" }
+#endif
 #ifdef USE_GLIBLOOP
     ,{ CMD_UNDOPCT, true, "undo-pct",
        "each second, what are the odds of doing an undo" }
@@ -2964,7 +2968,8 @@ main( int argc, char** argv )
                 usage(argv[0], "must be 0 <= n <= 100" );
             }
             break;
-
+#endif
+#ifdef XWFEATURE_ROBOTPHONIES
         case CMD_MAKE_PHONY_PCT:
             mainParams.makePhonyPct = atoi( optarg );
             if ( mainParams.makePhonyPct < 0 || mainParams.makePhonyPct > 100 ) {
diff --git a/xwords4/linux/main.h b/xwords4/linux/main.h
index a96642b53..27fabcc67 100644
--- a/xwords4/linux/main.h
+++ b/xwords4/linux/main.h
@@ -129,7 +129,9 @@ typedef struct LaunchParams {
     XP_U16 robotThinkMin, robotThinkMax;
     XP_U16 robotTradePct;
 #endif
+#ifdef XWFEATURE_ROBOTPHONIES
     XP_U16 makePhonyPct;
+#endif
     XP_Bool commsDisableds[COMMS_CONN_NTYPES][2];
 
     DeviceRole serverRole;