diff --git a/src/driver/amgc_driver_ctx.c b/src/driver/amgc_driver_ctx.c
index 728ecf5..d287008 100644
--- a/src/driver/amgc_driver_ctx.c
+++ b/src/driver/amgc_driver_ctx.c
@@ -295,8 +295,8 @@ void amgc_free_driver_ctx(struct amgc_driver_ctx * ctx)
 	uintptr_t			addr;
 
 	if (ctx) {
-		addr = (uintptr_t)ctx - offsetof(struct amgc_driver_ctx_alloc,ctx);
-		addr = addr - offsetof(struct amgc_driver_ctx_impl,ctx);
+		addr = (uintptr_t)ctx - offsetof(struct amgc_driver_ctx_impl,ctx);
+		addr = addr - offsetof(struct amgc_driver_ctx_alloc,ctx);
 		ictx = (struct amgc_driver_ctx_alloc *)addr;
 		amgc_free_driver_ctx_impl(ictx);
 	}