diff --git a/source/libs/index/src/index_fst.c b/source/libs/index/src/index_fst.c
index e40195e6e6..9cb4ac6836 100644
--- a/source/libs/index/src/index_fst.c
+++ b/source/libs/index/src/index_fst.c
@@ -1123,7 +1123,7 @@ CompiledAddr fstGetRootAddr(Fst *fst) {
 
 Output fstEmptyFinalOutput(Fst *fst, bool *null) {
   Output res = 0;
-  FstNode *node = fst->root;
+  FstNode *node = fstGetRoot(fst);
   if (FST_NODE_IS_FINAL(node)) {
     *null = false;
     res = FST_NODE_FINAL_OUTPUT(node); 
diff --git a/source/libs/index/src/index_fst_automation.c b/source/libs/index/src/index_fst_automation.c
index 803c95d0d8..f70b90041b 100644
--- a/source/libs/index/src/index_fst_automation.c
+++ b/source/libs/index/src/index_fst_automation.c
@@ -68,7 +68,7 @@ StartWithStateValue *startWithStateValueDump(StartWithStateValue *sv) {
 // prefix query, impl later
 
 static void* prefixStart(AutomationCtx *ctx) {  
-  StartWithStateValue *data = (StartWithStateValue *)(ctx->data);
+  StartWithStateValue *data = (StartWithStateValue *)(ctx->stdata);
   return startWithStateValueDump(data);     
 };
 static bool prefixIsMatch(AutomationCtx *ctx, void *sv) {