diff --git a/plugins/Assimp/xmake.lua b/plugins/Assimp/xmake.lua
index 525ee4c04..8912bb129 100644
--- a/plugins/Assimp/xmake.lua
+++ b/plugins/Assimp/xmake.lua
@@ -16,8 +16,7 @@ if has_config("assimp") then
 		add_deps("NazaraUtility")
 		add_packages("assimp")
 
-		add_headerfiles("**.hpp")
-		add_headerfiles("**.inl")
+		add_headerfiles("**.hpp", "**.inl", { prefixdir = "private" })
 		add_includedirs(".")
 		add_files("**.cpp")
 end
diff --git a/plugins/FFmpeg/xmake.lua b/plugins/FFmpeg/xmake.lua
index 02ba2d3c5..da558b9b0 100644
--- a/plugins/FFmpeg/xmake.lua
+++ b/plugins/FFmpeg/xmake.lua
@@ -16,8 +16,7 @@ if has_config("ffmpeg") then
 		add_deps("NazaraUtility")
 		add_packages("ffmpeg")
 
-		add_headerfiles("**.hpp")
-		add_headerfiles("**.inl")
+		add_headerfiles("**.hpp", "**.inl", { prefixdir = "private" })
 		add_includedirs(".")
 		add_files("**.cpp")
 end
diff --git a/tests/xmake.lua b/tests/xmake.lua
index f47155914..22c76fcb0 100644
--- a/tests/xmake.lua
+++ b/tests/xmake.lua
@@ -19,7 +19,7 @@ if has_config("tests") then
 
 	add_deps("NazaraAudio", "NazaraCore", "NazaraNetwork", "NazaraPhysics2D")
 	add_packages("catch2", "entt")
-	add_headerfiles("Engine/**.hpp")
+	add_headerfiles("Engine/**.hpp", { prefixdir = "private" })
 	add_files("resources.cpp")
 	add_files("Engine/**.cpp")
 	add_includedirs(".")
diff --git a/xmake.lua b/xmake.lua
index c44cb3a07..027e95884 100644
--- a/xmake.lua
+++ b/xmake.lua
@@ -257,7 +257,7 @@ for name, module in pairs(modules) do
 	local headerExts = {".h", ".hpp", ".inl", ".natvis"}
 	for _, ext in ipairs(headerExts) do
 		add_headerfiles("include/(Nazara/" .. name .. "/**" .. ext .. ")")
-		add_headerfiles("src/Nazara/" .. name .. "/**" .. ext)
+		add_headerfiles("src/Nazara/" .. name .. "/**" .. ext, { prefixdir = "private" })
 	end
 
 	remove_headerfiles("src/Nazara/" .. name .. "/Resources/**.h")