1 files changed, 2 insertions, 2 deletions
diff --git a/chapter15/src/main/java/com/seaofnodes/simple/Parser.java b/chapter15/src/main/java/com/seaofnodes/simple/Parser.java
index 1fc6f312..a0c15ae3 100644
--- a/chapter15/src/main/java/com/seaofnodes/simple/Parser.java
+++ b/chapter15/src/main/java/com/seaofnodes/simple/Parser.java
@@ -738,7 +738,7 @@ public class Parser {
         mem(after.peephole());
         out.unkeep();
         nnn.unkeep();
-        prior.unkeep();
+        if( prior.unkeep().isUnused() ) prior.kill();
         return ptr.unkeep();
     }
 
@@ -762,7 +762,7 @@ public class Parser {
         st.setDef(0,ctrl);
         st = st.peephole();
         mem(new MemMergeNode(prior,alias,st).peephole());
-        prior.unkeep();
+        if( prior.unkeep().isUnused() ) prior.kill();
     }
 
     /**