diff --git a/gui/Android.mk b/gui/Android.mk
index 1d0d134..6633e9a 100644
--- a/gui/Android.mk
+++ b/gui/Android.mk
@@ -27,7 +27,8 @@
     partitionlist.cpp \
     mousecursor.cpp \
     scrolllist.cpp \
-    patternpassword.cpp
+    patternpassword.cpp \
+    textbox.cpp
 
 ifneq ($(TWRP_CUSTOM_KEYBOARD),)
     LOCAL_SRC_FILES += $(TWRP_CUSTOM_KEYBOARD)