diff --git a/lib/convert-worker.js b/lib/convert-worker.js
index c3b4518..d9f45dd 100644
--- a/lib/convert-worker.js
+++ b/lib/convert-worker.js
@@ -426,6 +426,9 @@ function getBodyXML(chapter, contentEl) {
   xml = xml.replace(/well armed/g, "well-armed");
   xml = xml.replace(/able bodied/g, "able-bodied");
 
+  // Preemptive(ly) is often hyphenated (not always). It should not be.
+  xml = xml.replace(/([Pp])re-emptive/g, "$1reemptive");
+
   // One-off fixes
   (substitutions[chapter.url] || []).forEach(substitution => {
     if (substitution.before) {