diff --git a/src/elements/wifi.c b/src/elements/wifi.c
index 3e87fefa9..55d151d3c 100644
--- a/src/elements/wifi.c
+++ b/src/elements/wifi.c
@@ -12,6 +12,8 @@ int update_WIFI(UPDATE_FUNC_ARGS) {
 				r = pmap[y+ry][x+rx];
 				if (!r)
 					continue;
+				// wireless[][0] - whether channel is active on this frame
+				// wireless[][1] - whether channel should be active on next frame
 				if (wireless[parts[i].tmp][0])
 				{
 					if (((r&0xFF)==PT_NSCN||(r&0xFF)==PT_PSCN||(r&0xFF)==PT_INWR)&&parts[r>>8].life==0 && wireless[parts[i].tmp][0])
@@ -25,9 +27,8 @@ int update_WIFI(UPDATE_FUNC_ARGS) {
 				{
 					if ((r&0xFF)==PT_SPRK && parts[r>>8].ctype!=PT_NSCN && parts[r>>8].life>=3)
 					{
-						wireless[parts[i].tmp][0] = 1;
 						wireless[parts[i].tmp][1] = 1;
-						ISWIRE = 1;
+						ISWIRE = 2;
 					}
 				}
 			}
diff --git a/src/powder.c b/src/powder.c
index 6360529b8..2f427595f 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -1697,15 +1697,14 @@ void update_particles_i(pixel *vid, int start, int inc)
 			GENERATION ++;
 		//memset(gol2, 0, sizeof(gol2));
 	}
-	if (ISWIRE==1)//wifi channel reseting
+	if (ISWIRE>0)//wifi channel reseting
 	{
 		for ( q = 0; q<(int)(MAX_TEMP-73.15f)/100+2; q++)
-			if (!wireless[q][1])
-			{
-				wireless[q][0] = 0;
-			}
-			else
-				wireless[q][1] = 0;
+		{
+			wireless[q][0] = wireless[q][1];
+			wireless[q][1] = 0;
+		}
+		ISWIRE--;
 	}
 	for (i=0; i<=parts_lastActiveIndex; i++)
 		if (parts[i].type)