diff --git a/components/heap/port/esp8266/include/esp_heap_port.h b/components/heap/port/esp8266/include/esp_heap_port.h
index 4b9522b9..d820a6c4 100644
--- a/components/heap/port/esp8266/include/esp_heap_port.h
+++ b/components/heap/port/esp8266/include/esp_heap_port.h
@@ -28,7 +28,7 @@
 
 #define _heap_caps_feed_wdt(_num)           \
 {                                           \
-    extern void pp_soft_wdt_feed(void);     \
-    pp_soft_wdt_feed();                     \
+    extern void esp_task_wdt_reset(void);   \
+    esp_task_wdt_reset();                   \
 }
 
diff --git a/components/heap/src/esp_heap_trace.c b/components/heap/src/esp_heap_trace.c
index f0151331..00efa5c2 100644
--- a/components/heap/src/esp_heap_trace.c
+++ b/components/heap/src/esp_heap_trace.c
@@ -118,7 +118,7 @@ void heap_trace_dump(void)
             if (mem_blk_is_used(p) && mem_blk_is_traced(p)) {
                 mem2_blk_t *mem2_blk = (mem2_blk_t *)p;
 
-                if (mem2_blk->line == (size_t)-1) {
+                if (!mem2_blk->line) {
                     ESP_EARLY_LOGI(TAG, HEAP_INFO " caller func %p", HEAP_INFO_PARAM(p), mem2_blk->file);
                 } else {
                     const char *file = rindex(mem2_blk->file, '/');