diff --git a/CMakeLists.txt b/CMakeLists.txt
index 239e8aa4e9..4a7f42a726 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -332,6 +332,7 @@ if(EMSCRIPTEN)
     target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_BINARY_DIR}/lang@/lang")
     target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_SOURCE_DIR}/bin/ai@/ai")
     target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_SOURCE_DIR}/bin/game@/game")
+    target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_SOURCE_DIR}/TimGM6mb.sf2@/usr/share/sounds/sf2/TimGM6mb.sf2")
 
     # We use IDBFS for persistent storage.
     target_link_libraries(WASM::WASM INTERFACE "-lidbfs.js")
diff --git a/os/emscripten/emscripten-build.sh b/os/emscripten/emscripten-build.sh
index 7d1d9c6c6c..67431aa0c5 100755
--- a/os/emscripten/emscripten-build.sh
+++ b/os/emscripten/emscripten-build.sh
@@ -30,11 +30,30 @@ embuilder build liblzma
 embuilder build --lto liblzma
 
 mkdir -p baseset
+
 [ -e baseset/opengfx-0.6.1.tar ] || {
 	wget https://cdn.openttd.org/opengfx-releases/0.6.1/opengfx-0.6.1-all.zip || exit 1
 	unzip opengfx-0.6.1-all.zip || exit 1
 	rm opengfx-0.6.1-all.zip
-	mv opengfx-0.6.1.tar baseset/
+	mv opengfx-0.6.1.tar baseset/ || exit 1
+}
+
+[ -e baseset/opensfx-1.0.1.tar ] || {
+	wget https://cdn.openttd.org/opensfx-releases/1.0.1/opensfx-1.0.1-all.zip || exit 1
+	unzip opensfx-1.0.1-all.zip || exit 1
+	rm opensfx-1.0.1-all.zip
+	mv opensfx-1.0.1.tar baseset/ || exit 1
+}
+
+[ -e baseset/openmsx-0.4.0.tar ] || {
+	wget https://cdn.openttd.org/openmsx-releases/0.4.0/openmsx-0.4.0-all.zip || exit 1
+	unzip openmsx-0.4.0-all.zip || exit 1
+	rm openmsx-0.4.0-all.zip
+	mv openmsx-0.4.0.tar baseset/ || exit 1
+}
+
+[ -e TimGM6mb.sf2 ] || {
+	wget 'https://sourceforge.net/p/mscore/code/HEAD/tree/trunk/mscore/share/sound/TimGM6mb.sf2?format=raw' || exit 1
 }
 
 [ -e Makefile ] || emcmake cmake .. -DHOST_BINARY_DIR=$(pwd)/build-host -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DOPTION_USE_ASSERTS=OFF || exit 1