diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8d36ad2..8ee2d8d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -158,6 +158,7 @@ set(MAIN_SOURCE
 	src/main.cpp
 	src/audio.cpp
 	src/bitmap.cpp
+	src/emscripten.cpp
 	src/eventthread.cpp
 	src/filesystem.cpp
 	src/font.cpp
diff --git a/src/bitmap.cpp b/src/bitmap.cpp
index 90a1659..f61d3c9 100644
--- a/src/bitmap.cpp
+++ b/src/bitmap.cpp
@@ -45,7 +45,7 @@
 #include "eventthread.h"
 
 #ifdef __EMSCRIPTEN__
-#include <emscripten.h>
+#include "emscripten.hpp"
 #endif
 
 #define GUARD_MEGA \
@@ -237,39 +237,6 @@ struct BitmapPrivate
 	}
 };
 
-#ifdef __EMSCRIPTEN__
-EM_JS(void, load_file_async, (const char* fullPathC), {
-	Asyncify.handleSleep(function(wakeUp) {
-		const fullPath = UTF8ToString(fullPathC);
-
-		// Make cache object
-		if (!window.fileAsyncCache) window.fileAsyncCache = {};
-
-		// Check if already loaded
-		if (window.fileAsyncCache.hasOwnProperty(fullPath)) return wakeUp();
-
-		// Get full destination
-		const file = "game/" + fullPath;
-
-		// Get path and filename
-		const path = "/" + file.substring(0, file.lastIndexOf("/"));
-		const filename = file.substring(file.lastIndexOf("/") + 1);
-
-		// Get target URL
-		const iurl = "gameasync/" + fullPath;
-
-		// Delete original file
-		FS.unlink(path + "/" + filename);
-
-		// Get the new file
-		FS.createPreloadedFile(path, filename, iurl, true, true, function() {
-			window.fileAsyncCache[fullPath] = 1;
-			wakeUp();
-		}, console.error);
-	});
-});
-#endif;
-
 struct BitmapOpenHandler : FileSystem::OpenHandler
 {
 	SDL_Surface *surf;
diff --git a/src/emscripten.cpp b/src/emscripten.cpp
new file mode 100644
index 0000000..fefa90c
--- /dev/null
+++ b/src/emscripten.cpp
@@ -0,0 +1,33 @@
+#include "emscripten.hpp"
+
+EM_JS(void, load_file_async, (const char* fullPathC), {
+	Asyncify.handleSleep(function(wakeUp) {
+		const fullPath = UTF8ToString(fullPathC);
+
+		// Make cache object
+		if (!window.fileAsyncCache) window.fileAsyncCache = {};
+
+		// Check if already loaded
+		if (window.fileAsyncCache.hasOwnProperty(fullPath)) return wakeUp();
+
+		// Get full destination
+		const file = "game/" + fullPath;
+
+		// Get path and filename
+		const path = "/" + file.substring(0, file.lastIndexOf("/"));
+		const filename = file.substring(file.lastIndexOf("/") + 1);
+
+		// Get target URL
+		const iurl = "gameasync/" + fullPath;
+
+		// Delete original file
+		FS.unlink(path + "/" + filename);
+
+		// Get the new file
+		FS.createPreloadedFile(path, filename, iurl, true, true, function() {
+			window.fileAsyncCache[fullPath] = 1;
+			wakeUp();
+		}, console.error);
+	});
+});
+
diff --git a/src/emscripten.hpp b/src/emscripten.hpp
new file mode 100644
index 0000000..a44e991
--- /dev/null
+++ b/src/emscripten.hpp
@@ -0,0 +1,14 @@
+#ifndef EMSCRIPTEN_HPP
+#define EMSCRIPTEN_HPP
+
+#ifdef __EMSCRIPTEN__
+#include <emscripten.h>
+
+extern "C" {
+	void load_file_async(const char* fullPathC);
+}
+
+#endif
+
+#endif
+