diff --git a/libc/Android.mk b/libc/Android.mk
index cfebd9cc6..b0a9fb1c3 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -107,7 +107,7 @@ libc_bionic_src_files := \
     bionic/clearenv.cpp \
     bionic/clock.cpp \
     bionic/clone.cpp \
-    bionic/cmsg_nxthdr.cpp \
+    bionic/__cmsg_nxthdr.cpp \
     bionic/connect.cpp \
     bionic/__cxa_guard.cpp \
     bionic/__cxa_pure_virtual.cpp \
diff --git a/libc/bionic/cmsg_nxthdr.cpp b/libc/bionic/__cmsg_nxthdr.cpp
similarity index 100%
rename from libc/bionic/cmsg_nxthdr.cpp
rename to libc/bionic/__cmsg_nxthdr.cpp