diff --git a/src/powder.c b/src/powder.c
index c84d71ca0..cdad9b09f 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -75,12 +75,11 @@ int try_move(int i, int x, int y, int nx, int ny)
     e = eval_move(parts[i].type, nx, ny, &r);
     if(!e) {
         if(!legacy_enable && parts[i].type==PT_PHOT) {
-            if((r >> 8) < PT_NUM)
+            if((r & 0xFF ) < PT_NUM)
                 parts[i].temp = parts[r>>8].temp =
                                     restrict_flt((parts[r>>8].temp+parts[i].temp)/2, MIN_TEMP, MAX_TEMP);
         }
         return 0;
-        return 0;
     }
     if(e == 2)
         return 1;