diff --git a/wifi/1.0/default/Android.mk b/wifi/1.0/default/Android.mk
index 144c067..ac484b6 100644
--- a/wifi/1.0/default/Android.mk
+++ b/wifi/1.0/default/Android.mk
@@ -19,6 +19,7 @@
 LOCAL_CPPFLAGS := -Wall -Werror -Wextra
 LOCAL_SRC_FILES := \
     hidl_struct_util.cpp \
+    hidl_sync_util.cpp \
     service.cpp \
     wifi.cpp \
     wifi_ap_iface.cpp \