diff --git a/polymer/eduke32/build/include/build.h b/polymer/eduke32/build/include/build.h
index 3287b1c0f..7a14e37bd 100644
--- a/polymer/eduke32/build/include/build.h
+++ b/polymer/eduke32/build/include/build.h
@@ -62,6 +62,11 @@ extern "C" {
 #define PR_LIGHT_PRIO_LOW       4
 #define PR_LIGHT_PRIO_LOW_GAME  5
 
+////////// True Room over Room (YAX == rot -17 of "PRO") //////////
+#define YAX_ENABLE
+//#define YAX_DEBUG
+//#define ENGINE_SCREENSHOT_DEBUG
+
 ////////// yax defs //////////
 #define SECTORFLD(Sect,Fld, Cf) (*((Cf) ? (&sector[Sect].floor##Fld) : (&sector[Sect].ceiling##Fld)))
 
diff --git a/polymer/eduke32/build/src/build.c b/polymer/eduke32/build/src/build.c
index a8bf491be..8df4e6d4f 100644
--- a/polymer/eduke32/build/src/build.c
+++ b/polymer/eduke32/build/src/build.c
@@ -1546,7 +1546,8 @@ static int32_t newnumwalls=-1;
 static void ovh_whiteoutgrab(void)
 {
     int32_t i, j, k, startwall, endwall;
-#ifdef YAX_ENABLE
+#if 0
+//def YAX_ENABLE
     int16_t cb, fb;
 #endif
 
@@ -2047,7 +2048,8 @@ static int32_t trace_loop(int32_t j, uint8_t *visitedwall, int16_t *ignore_ret,
 {
     int16_t refsect, ignore;
     int32_t k, n, refwall;
-#ifdef YAX_ENABLE
+#if 0
+//def YAX_ENABLE
     int32_t yaxp = (ignore_ret==NULL);  // bleh
 #else
     UNREFERENCED_PARAMETER(trace_loop_yaxcf);
diff --git a/polymer/eduke32/build/src/engine.c b/polymer/eduke32/build/src/engine.c
index bfedb17a2..9a767056e 100644
--- a/polymer/eduke32/build/src/engine.c
+++ b/polymer/eduke32/build/src/engine.c
@@ -538,9 +538,11 @@ static inline int32_t yax_walldist(int32_t w)
 // calculate distances to bunches and best start-drawing sectors
 static void yax_scanbunches(int32_t bbeg, int32_t numhere, const uint8_t *lastgotsector)
 {
-    int32_t bnchcnt, bunchnum, j, k, w, ns;
+    int32_t bnchcnt, bunchnum, j, k;
     int32_t startwall, endwall;
 
+    UNREFERENCED_PARAMETER(lastgotsector);
+
     scansector_retfast = 1;
     scansector_collectsprites = 0;