diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c
index 0e78d8e198959..fb6ab9cef84f7 100644
--- a/tools/testing/cxl/test/cxl.c
+++ b/tools/testing/cxl/test/cxl.c
@@ -999,10 +999,6 @@ static void mock_companion(struct acpi_device *adev, struct device *dev)
 #define SZ_64G (SZ_32G * 2)
 #endif
 
-#ifndef SZ_512G
-#define SZ_512G (SZ_64G * 8)
-#endif
-
 static __init int cxl_rch_init(void)
 {
 	int rc, i;