diff --git a/lib/libsys/arm/Makefile.sys b/lib/libsys/arm/Makefile.sys
index 424d2f9cc9d8..e8b420932031 100644
--- a/lib/libsys/arm/Makefile.sys
+++ b/lib/libsys/arm/Makefile.sys
@@ -1,8 +1,13 @@
 SRCS+=	__vdso_gettc.c \
 	pdrfork_thread_gen.c \
 	rfork_thread_gen.c \
 	sched_getcpu_gen.c
 
 MDASM= \
 	cerror.S \
 	vfork.S
+
+.if ${LIB} == "sys"
+.PATH: ${LIBSYS_SRCTOP}/../libc/arm/aeabi
+SRCS+=	aeabi_unwind_cpp.c
+.endif