diff --git a/libc/arch-arm/arm.mk b/libc/arch-arm/arm.mk
index cbc5fa7..2dbcb56 100644
--- a/libc/arch-arm/arm.mk
+++ b/libc/arch-arm/arm.mk
@@ -4,6 +4,7 @@
 libc_common_src_files_arm := \
     bionic/legacy_32_bit_support.cpp \
     bionic/ndk_cruft.cpp \
+    bionic/time64.c \
 
 # These are shared by all the 32-bit targets, but not the 64-bit ones.
 libc_bionic_src_files_arm := \