diff --git a/src/trans.c b/src/trans.c
index f0ea6c1ea1..49d470f4fe 100644
--- a/src/trans.c
+++ b/src/trans.c
@@ -2650,6 +2650,7 @@ Obj FuncMOVED_PTS_TRANS(Obj self, Obj f)
         for (i = 0; i < deg; i++) {
             if (ptf2[i] != i) {
                 AssPlist(out, ++len, INTOBJ_INT(i + 1));
+                ptf2 = CONST_ADDR_TRANS2(f);
             }
         }
     }
@@ -2660,6 +2661,7 @@ Obj FuncMOVED_PTS_TRANS(Obj self, Obj f)
         for (i = 0; i < deg; i++) {
             if (ptf4[i] != i) {
                 AssPlist(out, ++len, INTOBJ_INT(i + 1));
+                ptf4 = CONST_ADDR_TRANS4(f);
             }
         }
     }