diff --git a/extras/buildbot-emscripten.sh b/extras/buildbot-emscripten.sh
index e96e8ac..79f20a3 100755
--- a/extras/buildbot-emscripten.sh
+++ b/extras/buildbot-emscripten.sh
@@ -50,7 +50,6 @@ echo "Setting up Emscripten SDK environment..."
 source "$ENVSCRIPT"
 
 echo "Setting up..."
-set -x
 cd "$PHYSFSBASE"
 rm -rf buildbot
 mkdir buildbot
diff --git a/src/physfs_platforms.h b/src/physfs_platforms.h
index 2a6c820..55ebff0 100644
--- a/src/physfs_platforms.h
+++ b/src/physfs_platforms.h
@@ -61,6 +61,10 @@
 #  define PHYSFS_PLATFORM_BSD 1
 #  define PHYSFS_PLATFORM_UNIX 1
 #  define PHYSFS_PLATFORM_POSIX 1
+#elif defined(__EMSCRIPTEN__)
+#  define PHYSFS_NO_CDROM_SUPPORT 1
+#  define PHYSFS_PLATFORM_UNIX 1
+#  define PHYSFS_PLATFORM_POSIX 1
 #elif defined(unix) || defined(__unix__)
 #  define PHYSFS_PLATFORM_UNIX 1
 #  define PHYSFS_PLATFORM_POSIX 1