diff --git a/packages/micropolis-engine/src/allocate.cpp b/packages/micropolis-engine/src/allocate.cpp
index cae10b59..2550867a 100644
--- a/packages/micropolis-engine/src/allocate.cpp
+++ b/packages/micropolis-engine/src/allocate.cpp
@@ -120,8 +120,6 @@ void Micropolis::initMapArrays()
 /** Free all map arrays */
 void Micropolis::destroyMapArrays()
 {
-    printf("destroyMapArrays: mapBase: %p\n", mapBase);
-
     if (mapBase != NULL) {
         freePtr(mapBase);
         mapBase = NULL;
diff --git a/packages/micropolis-engine/src/micropolis.cpp b/packages/micropolis-engine/src/micropolis.cpp
index 5230c74e..b7828fbc 100644
--- a/packages/micropolis-engine/src/micropolis.cpp
+++ b/packages/micropolis-engine/src/micropolis.cpp
@@ -128,8 +128,6 @@ void Micropolis::setCallback(Callback *callback0, emscripten::val callbackVal0)
 /** Initialize simulator variables to a sane default. */
 void Micropolis::init()
 {
-    printf("init");
-    
     ////////////////////////////////////////////////////////////////////////
     // allocate.cpp
 
diff --git a/packages/micropolis-engine/src/zone.cpp b/packages/micropolis-engine/src/zone.cpp
index e88ec900..51253b1a 100644
--- a/packages/micropolis-engine/src/zone.cpp
+++ b/packages/micropolis-engine/src/zone.cpp
@@ -137,7 +137,7 @@ void Micropolis::doZone(const Position &pos)
         return;
     }
 
-    printf("UNEXPECTED ZONE: %d !!!\n", tile);
+    // Tiles 1019-1023 reach here, outside USED_TILE_COUNT.
 }
 
 /**