diff --git a/board/thead/light-c910/lpddr4/src/ddr_common_func.c b/board/thead/light-c910/lpddr4/src/ddr_common_func.c
index d3150dba..4033383f 100644
--- a/board/thead/light-c910/lpddr4/src/ddr_common_func.c
+++ b/board/thead/light-c910/lpddr4/src/ddr_common_func.c
@@ -49,7 +49,7 @@ int get_ddr_rank_number() {
 #ifdef CONFIG_DDR_MSG
 	DDR_DEBUG("unsupported ddr rank type!!!\n");
 #endif
-    return NULL;
+    return 0;
 #endif
 }