diff --git a/CMakeLists.txt b/CMakeLists.txt
index ca2284ffc1..bbde268c4b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -242,6 +242,8 @@ if(EMSCRIPTEN)
     # Allow heap-growth, and start with a bigger memory size.
     target_link_libraries(WASM::WASM INTERFACE "-s ALLOW_MEMORY_GROWTH=1")
     target_link_libraries(WASM::WASM INTERFACE "-s INITIAL_MEMORY=33554432")
+    target_link_libraries(WASM::WASM INTERFACE "-s DISABLE_EXCEPTION_CATCHING=0")
+    add_definitions(-s DISABLE_EXCEPTION_CATCHING=0)
 
     # Export functions to Javascript.
     target_link_libraries(WASM::WASM INTERFACE "-s EXPORTED_FUNCTIONS='[\"_main\", \"_em_openttd_add_server\"]' -s EXTRA_EXPORTED_RUNTIME_METHODS='[\"cwrap\"]'")