diff --git a/kernel/model/assets.go b/kernel/model/assets.go
index 915a0e039..4741f8351 100644
--- a/kernel/model/assets.go
+++ b/kernel/model/assets.go
@@ -965,6 +965,15 @@ func MissingAssets() (ret []string) {
 				continue
 			}
 
+			if strings.Contains(strings.ToLower(dest), ".pdf/") {
+				if idx := strings.LastIndex(dest, "/"); -1 < idx {
+					if ast.IsNodeIDPattern(dest[idx+1:]) {
+						// PDF 标注不计入 https://github.com/siyuan-note/siyuan/issues/13891
+						continue
+					}
+				}
+			}
+
 			if "" == assetsPathMap[dest] {
 				if strings.HasPrefix(dest, "assets/.") {
 					// Assets starting with `.` should not be considered missing assets https://github.com/siyuan-note/siyuan/issues/8821