diff --git a/src/asahi/lib/shaders/libagx.h b/src/asahi/lib/shaders/libagx.h
index 30f5e45d272..5f0f79fcd1b 100644
--- a/src/asahi/lib/shaders/libagx.h
+++ b/src/asahi/lib/shaders/libagx.h
@@ -14,7 +14,7 @@
 #define AGX_STATIC_ASSERT(_COND) static_assert(_COND, "OpenCL assertion")
 #else
 #pragma OPENCL EXTENSION cl_khr_fp16 : enable
-#define PACKED
+#define PACKED        __attribute__((packed, aligned(4)))
 #define GLOBAL(type_) global type_ *
 
 typedef ulong uint64_t;