diff --git a/src/de/inetsoftware/jwebassembly/module/BranchManager.java b/src/de/inetsoftware/jwebassembly/module/BranchManager.java
index 66538b0..a507848 100644
--- a/src/de/inetsoftware/jwebassembly/module/BranchManager.java
+++ b/src/de/inetsoftware/jwebassembly/module/BranchManager.java
@@ -739,7 +739,8 @@ class BranchManager {
     @Nonnull
     private BranchNode findChildNodeAt( @Nonnull BranchNode parent, int codePosition ) {
         for( BranchNode node : parent ) {
-            if( node.startPos <= codePosition && codePosition <= node.endPos ) {
+            // the end position of a block is position of the first instruction outside of the block 
+            if( node.startPos <= codePosition && codePosition < node.endPos ) {
                 return findChildNodeAt( node, codePosition );
             }
         }