diff --git a/src/de/inetsoftware/jwebassembly/module/BranchManger.java b/src/de/inetsoftware/jwebassembly/module/BranchManger.java
index e7ed910..8622ac6 100644
--- a/src/de/inetsoftware/jwebassembly/module/BranchManger.java
+++ b/src/de/inetsoftware/jwebassembly/module/BranchManger.java
@@ -1586,7 +1586,7 @@ class BranchManger {
             }
             switch( startBlock.getOperation() ) {
                 case IF:
-//                case BLOCK:
+                case BLOCK:
                 try {
                     ArrayDeque<AnyType> stack = new ArrayDeque<>();
                     stack.push( ValueType.empty );