diff --git a/src/simulation/Simulation.cpp b/src/simulation/Simulation.cpp
index 3c6fadb43..aa0a72398 100644
--- a/src/simulation/Simulation.cpp
+++ b/src/simulation/Simulation.cpp
@@ -4709,7 +4709,7 @@ killed:
 								{
 									if ((TYP(pmap[j][nx])!=t || bmap[j/CELL][nx/CELL]) && do_move(i, nx, ny, (float)nx, (float)j))
 										break;
-									if ((pmap[j][nx]&255)!=t || (bmap[j/CELL][nx/CELL] && bmap[j/CELL][nx/CELL]!=WL_STREAM))
+									if (TYP(pmap[j][nx])!=t || (bmap[j/CELL][nx/CELL] && bmap[j/CELL][nx/CELL]!=WL_STREAM))
 										break;
 								}
 							else if (s==-1) {} // particle is out of bounds