diff --git a/.gitmodules b/.gitmodules
index 1873e314a0..a4a085325c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -52,3 +52,6 @@
 [submodule "Vulkan-Utility-Libraries"]
 	path = externals/Vulkan-Utility-Libraries
 	url = https://github.com/KhronosGroup/Vulkan-Utility-Libraries.git
+[submodule "externals/SPIRV-Headers"]
+	path = externals/SPIRV-Headers
+	url = https://github.com/KhronosGroup/SPIRV-Headers.git
diff --git a/externals/SPIRV-Headers b/externals/SPIRV-Headers
new file mode 160000
index 0000000000..8b246ff75c
--- /dev/null
+++ b/externals/SPIRV-Headers
@@ -0,0 +1 @@
+Subproject commit 8b246ff75c6615ba4532fe4fde20f1be090c3764
diff --git a/externals/sirit/CMakeLists.txt b/externals/sirit/CMakeLists.txt
index ca7e3b6cd2..ce887d5124 100644
--- a/externals/sirit/CMakeLists.txt
+++ b/externals/sirit/CMakeLists.txt
@@ -88,7 +88,7 @@ enable_testing(true)
 if (SIRIT_USE_SYSTEM_SPIRV_HEADERS)
     find_package(SPIRV-Headers REQUIRED)
 else()
-    add_subdirectory(externals/SPIRV-Headers EXCLUDE_FROM_ALL)
+    add_subdirectory(${CMAKE_SOURCE_DIR}/externals/SPIRV-Headers externals/SPIRV-Headers EXCLUDE_FROM_ALL)
     add_library(SPIRV-Headers::SPIRV-Headers ALIAS SPIRV-Headers)
 endif()