diff --git a/macros.js b/macros.js
index 110ec62..301b844 100644
--- a/macros.js
+++ b/macros.js
@@ -262,7 +262,7 @@ function readPstring(){
    result = (isNodeHigh(nodenames['p7'])?'N':'n') +
             (isNodeHigh(nodenames['p6'])?'V':'v') +
             '&#8209' +  // non-breaking hyphen
-            (isNodeHigh(nodenames['p3'])?'B':'b') +
+            (isNodeHigh(nodenames['p4'])?'B':'b') +
             (isNodeHigh(nodenames['p3'])?'D':'d') +
             (isNodeHigh(nodenames['p2'])?'I':'i') +
             (isNodeHigh(nodenames['p1'])?'Z':'z') +