1 files changed, 3 insertions, 5 deletions

diff --git a/ldebug.c b/ldebug.c
index aef52e15..6e16b0fb 100644
--- a/ldebug.c
+++ b/ldebug.c
@@ -465,16 +465,14 @@ static int filterpc (int pc, int jmptarget) {
 
 
 /*
-** try to find last instruction before 'lastpc' that modified register 'reg'
+** Try to find last instruction before 'lastpc' that modified register 'reg'.
 */
 static int findsetreg (const Proto *p, int lastpc, int reg) {
   int pc;
   int setreg = -1;  /* keep last instruction that changed 'reg' */
   int jmptarget = 0;  /* any code before this address is conditional */
-  if (GET_OPCODE(p->code[lastpc]) == OP_MMBIN ||
-      GET_OPCODE(p->code[lastpc]) == OP_MMBINI ||
-      GET_OPCODE(p->code[lastpc]) == OP_MMBINK)
-    lastpc--;
+  if (testMMMode(GET_OPCODE(p->code[lastpc])))
+    lastpc--;  /* previous instruction was not actually executed */
   for (pc = 0; pc < lastpc; pc++) {
     Instruction i = p->code[pc];
     OpCode op = GET_OPCODE(i);