diff --git a/shared/static/wasm/sx/dom.sx b/shared/static/wasm/sx/dom.sx
index e8506300..ddef8f06 100644
--- a/shared/static/wasm/sx/dom.sx
+++ b/shared/static/wasm/sx/dom.sx
@@ -97,10 +97,6 @@
   (fn (child parent)
     (and child parent (host-call parent "contains" child))))
 
-(define dom-listen
-  (fn (el event-name handler)
-    (host-call el "addEventListener" event-name (host-callback handler))))
-
 (define dom-attr-list
   (fn (el)
     ;; Return list of (name value) pairs for all attributes on the element.
diff --git a/shared/sx/ocaml_sync.py b/shared/sx/ocaml_sync.py
index 1418e055..76398c06 100644
--- a/shared/sx/ocaml_sync.py
+++ b/shared/sx/ocaml_sync.py
@@ -132,7 +132,7 @@ class OcamlSync:
     def eval(self, source: str) -> str:
         """Evaluate SX source, return result as string."""
         self._ensure()
-        escaped = source.replace("\\", "\\\\").replace('"', '\\"')
+        escaped = source.replace("\\", "\\\\").replace('"', '\\"').replace("\n", "\\n")
         self._send(f'(eval "{escaped}")')
         return self._read_response()
 
@@ -145,7 +145,7 @@ class OcamlSync:
     def load_source(self, source: str) -> str:
         """Load SX source directly into the kernel."""
         self._ensure()
-        escaped = source.replace("\\", "\\\\").replace('"', '\\"')
+        escaped = source.replace("\\", "\\\\").replace('"', '\\"').replace("\n", "\\n")
         self._send(f'(load-source "{escaped}")')
         return self._read_response()
 
diff --git a/web/lib/dom.sx b/web/lib/dom.sx
index e8506300..ddef8f06 100644
--- a/web/lib/dom.sx
+++ b/web/lib/dom.sx
@@ -97,10 +97,6 @@
   (fn (child parent)
     (and child parent (host-call parent "contains" child))))
 
-(define dom-listen
-  (fn (el event-name handler)
-    (host-call el "addEventListener" event-name (host-callback handler))))
-
 (define dom-attr-list
   (fn (el)
     ;; Return list of (name value) pairs for all attributes on the element.