diff --git a/scripts/toolchain.lua b/scripts/toolchain.lua
index 0152ce7..cec1a3d 100644
--- a/scripts/toolchain.lua
+++ b/scripts/toolchain.lua
@@ -1022,6 +1022,7 @@ function toolchain(_buildDir, _libDir)
 		libdirs { path.join(_libDir, "lib/asmjs") }
 		buildoptions {
 			"-i\"system$(EMSCRIPTEN)/system/include\"",
+			"-i\"system$(EMSCRIPTEN)/system/include/libcxx\"",
 			"-i\"system$(EMSCRIPTEN)/system/include/libc\"",
 			"-Wunused-value",
 			"-Wundef",