--- a/js/src/jsopcode.cpp
+++ b/js/src/jsopcode.cpp
@@ -5162,17 +5162,17 @@ js_DecompileValueGenerator(JSContext *cx
 
       release_pcstack:
         cx->free(pcstack);
         if (pcdepth < 0)
             goto do_fallback;
     }
 
     {
-        jsbytecode* pc = cx->regs->pc;
+        jsbytecode* basepc = cx->regs->pc;
         jsbytecode* savedImacropc = fp->maybeImacropc();
         if (savedImacropc) {
             JS_ASSERT(cx->hasfp());
             cx->regs->pc = savedImacropc;
             fp->clearImacropc();
         }
 
         /*
@@ -5182,17 +5182,17 @@ js_DecompileValueGenerator(JSContext *cx
         char *name;
         if (savedImacropc && size_t(pc - script->code) >= script->length)
             name = FAILED_EXPRESSION_DECOMPILER;
         else
             name = DecompileExpression(cx, script, fp->maybeFun(), pc);
 
         if (savedImacropc) {
             JS_ASSERT(cx->hasfp());
-            cx->regs->pc = pc;
+            cx->regs->pc = basepc;
             fp->setImacropc(savedImacropc);
         }
 
         if (name != FAILED_EXPRESSION_DECOMPILER)
             return name;
     }
 
   do_fallback: