diff --git a/src/engine/instrument.cpp b/src/engine/instrument.cpp
index 7dabac9a8..97b3bad86 100644
--- a/src/engine/instrument.cpp
+++ b/src/engine/instrument.cpp
@@ -2264,8 +2264,16 @@ void DivInstrument::readFeatureOx(SafeReader& reader, int op, short version) {
 
     // <167 TL macro compat
     if (macroCode==6 && version<167) {
-      for (int i=0; i<target->len; i++) {
-        target->val[i]^=0x7f;
+      for (int i=0; i<4; i++) {
+        if (target->open&6) {
+            for (int j=0; j<2; j++) {
+            target->val[j]^=0x7f;
+          }
+        } else {
+          for (int j=0; j<target->len; j++) {
+            target->val[j]^=0x7f;
+          }
+        }
       }
     }
   }