diff --git a/libc/Android.bp b/libc/Android.bp
index b0e0d8c..42d0914 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -1399,6 +1399,7 @@
         "bionic/assert.cpp",
         "bionic/atof.cpp",
         "bionic/bionic_arc4random.cpp",
+        "bionic/bionic_futex.cpp",
         "bionic/bionic_netlink.cpp",
         "bionic/bionic_systrace.cpp",
         "bionic/bionic_time_conversions.cpp",