diff --git a/libc/include/sys/cdefs_elf.h b/libc/include/sys/cdefs_elf.h
index e051b1d..1e57470 100644
--- a/libc/include/sys/cdefs_elf.h
+++ b/libc/include/sys/cdefs_elf.h
@@ -95,6 +95,10 @@
 	__asm__(".section _sec\n\t.asciz _str\n\t.previous")
 #endif
 
+/* GCC visibility helper macro */
+#define __LIBC_HIDDEN__							\
+	__attribute__ ((visibility ("hidden")))
+
 #define	__IDSTRING(_n,_s)		__SECTIONSTRING(.ident,_s)
 
 #define	__RCSID(_s)			__IDSTRING(rcsid,_s)
diff --git a/libc/unistd/abort.c b/libc/unistd/abort.c
index 3e3aab0..8b8659b 100644
--- a/libc/unistd/abort.c
+++ b/libc/unistd/abort.c
@@ -40,7 +40,7 @@
     __libc_android_log_print(ANDROID_LOG_DEBUG, "libc-abort", (format), ##__VA_ARGS__ )
 
 #ifdef __arm__
-void
+__LIBC_HIDDEN__ void
 __libc_android_abort(void)
 #else
 void