diff --git a/js2/src/bytecodegen.cpp b/js2/src/bytecodegen.cpp
index 56071e08e325..0e23b563affc 100644
--- a/js2/src/bytecodegen.cpp
+++ b/js2/src/bytecodegen.cpp
@@ -2346,7 +2346,7 @@ uint32 printInstruction(Formatter &f, uint32 i, const ByteCodeModule& bcm)
     case SetElementOp:
         {
             uint16 u = bcm.getShort(i);
-            printFormat(f, "%uh", i);
+            printFormat(f, "%uh", u);
             i += 2;
         }
         break;
@@ -2361,7 +2361,7 @@ uint32 printInstruction(Formatter &f, uint32 i, const ByteCodeModule& bcm)
     case DupInsertNOp:
         {
             uint16 u = bcm.getShort(i);
-            printFormat(f, "%uh", i);
+            printFormat(f, "%uh", u);
             i += 2;
         }
         break;