diff --git a/polymer/eduke32/source/actors.c b/polymer/eduke32/source/actors.c
index 89ed4156c..3cb587774 100644
--- a/polymer/eduke32/source/actors.c
+++ b/polymer/eduke32/source/actors.c
@@ -667,6 +667,7 @@ inline void G_AddGameLight(int32_t radius, int32_t srcsprite, int32_t zoffset, i
         ActorExtra[srcsprite].lightmaxrange = mylight.range = range;
 
         mylight.priority = priority;
+        mylight.tilenum = 0;
 
         ActorExtra[srcsprite].lightId = polymer_addlight(&mylight);
         if (ActorExtra[srcsprite].lightId >= 0)
@@ -7579,6 +7580,7 @@ static void G_MoveEffectors(void)   //STATNUM 3
                     mylight.horiz = SH;
                     mylight.minshade = sprite[i].xoffset;
                     mylight.maxshade = sprite[i].yoffset;
+                    mylight.tilenum = 0;
 
                     if (CS & 2)
                     {
@@ -7641,6 +7643,7 @@ static void G_MoveEffectors(void)   //STATNUM 3
                     mylight.horiz = SH;
                     mylight.minshade = sprite[i].xoffset;
                     mylight.maxshade = sprite[i].yoffset;
+                    mylight.tilenum = 0;
 
                     if (CS & 2)
                     {
diff --git a/polymer/eduke32/source/astub.c b/polymer/eduke32/source/astub.c
index 6920c9f29..a1f46bb04 100644
--- a/polymer/eduke32/source/astub.c
+++ b/polymer/eduke32/source/astub.c
@@ -10149,6 +10149,7 @@ void ExtPreCheckKeys(void) // just before drawrooms
                                 mylight.horiz = SH;
                                 mylight.minshade = sprite[i].xoffset;
                                 mylight.maxshade = sprite[i].yoffset;
+                                mylight.tilenum = 0;
 
                                 if (CS & 2)
                                 {
@@ -10210,6 +10211,7 @@ void ExtPreCheckKeys(void) // just before drawrooms
                                 mylight.horiz = SH;
                                 mylight.minshade = sprite[i].xoffset;
                                 mylight.maxshade = sprite[i].yoffset;
+                                mylight.tilenum = 0;
 
                                 if (CS & 2)
                                 {