diff --git a/Android.mk b/Android.mk
index 61181f7f9f8df..a38e9e797a9b6 100644
--- a/Android.mk
+++ b/Android.mk
@@ -645,7 +645,8 @@ framework_docs_LOCAL_DROIDDOC_OPTIONS := \
     -since $(SRC_API_DIR)/17.txt 17 \
     -since $(SRC_API_DIR)/18.txt 18 \
     -since $(SRC_API_DIR)/19.txt 19 \
-		-werror -hide 111 -hide 113 \
+    -since $(SRC_API_DIR)/20.txt 20 \
+		-werror -hide 113 \
 		-overview $(LOCAL_PATH)/core/java/overview.html
 
 framework_docs_LOCAL_API_CHECK_ADDITIONAL_JAVA_DIR:= \