diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
index e3003f49..1b50783 100644
--- a/drivers/cxl/mem.c
+++ b/drivers/cxl/mem.c
@@ -998,7 +998,7 @@
 		return NULL;
 	}
 
-	offset = ((u64)reg_hi << 32) | FIELD_GET(CXL_REGLOC_ADDR_MASK, reg_lo);
+	offset = ((u64)reg_hi << 32) | (reg_lo & CXL_REGLOC_ADDR_MASK);
 	bar = FIELD_GET(CXL_REGLOC_BIR_MASK, reg_lo);
 
 	/* Basic sanity check that BAR is big enough */