diff --git a/changes/sdk/pr.479.gh.OpenXR-SDK-Source.md b/changes/sdk/pr.479.gh.OpenXR-SDK-Source.md
new file mode 100644
index 000000000..123559d52
--- /dev/null
+++ b/changes/sdk/pr.479.gh.OpenXR-SDK-Source.md
@@ -0,0 +1,4 @@
+---
+- pr.479.gh.OpenXR-SDK-Source
+---
+Loader: Fix build error on loong64, and add loong64 in the architecture table in the loader documentation.
diff --git a/specification/loader/runtime.adoc b/specification/loader/runtime.adoc
index 930adc665..c9eff46d3 100644
--- a/specification/loader/runtime.adoc
+++ b/specification/loader/runtime.adoc
@@ -379,6 +379,11 @@ architectures and ABIs is used.
   | `sparc64`
   | 64-bit SPARC architecture
 
+|`loong64`
+  |
+  | `loong64`
+  | 64-bit LoongArch architecture, little endian (LP64D ABI)
+
 |===
 
 [[android-arm32-note]]
diff --git a/src/common/platform_utils.hpp b/src/common/platform_utils.hpp
index 19cd41cbb..59b5bf2fe 100644
--- a/src/common/platform_utils.hpp
+++ b/src/common/platform_utils.hpp
@@ -71,6 +71,8 @@
 #define XR_ARCH_ABI "riscv64"
 #elif defined(__sparc__) && defined(__arch64__)
 #define XR_ARCH_ABI "sparc64"
+#elif defined(__loongarch64)
+#define XR_ARCH_ABI "loong64"
 #else
 #error "No architecture string known!"
 #endif