diff --git a/libc/include/strings.h b/libc/include/strings.h
index ccdac04..a054aed 100644
--- a/libc/include/strings.h
+++ b/libc/include/strings.h
@@ -51,17 +51,15 @@
 
 __BEGIN_DECLS
 
-#if defined(__BIONIC_FORTIFY)
 /** Deprecated. Use memmove() instead. */
-#define bcopy(b1, b2, len) (void)(__builtin___memmove_chk((b2), (b1), (len), __bos0(b2)))
+static __inline__ __always_inline void bcopy(const void* b1, void* b2, size_t len) {
+  __builtin_memmove(b2, b1, len);
+}
+
 /** Deprecated. Use memset() instead. */
-#define bzero(b, len) (void)(__builtin___memset_chk((b), '\0', (len), __bos0(b)))
-#else
-/** Deprecated. Use memmove() instead. */
-#define bcopy(b1, b2, len) (void)(__builtin_memmove((b2), (b1), (len)))
-/** Deprecated. Use memset() instead. */
-#define bzero(b, len) (void)(__builtin_memset((b), '\0', (len)))
-#endif
+static __inline__ __always_inline void bzero(void* b, size_t len) {
+  __builtin_memset(b, 0, len);
+}
 
 #if !defined(__i386__) || __ANDROID_API__ >= __ANDROID_API_J_MR2__
 /**
@@ -72,6 +70,10 @@
 int ffs(int __i) __INTRODUCED_IN_X86(18);
 #endif
 
+#if defined(__BIONIC_INCLUDE_FORTIFY_HEADERS)
+#include <bits/fortify/strings.h>
+#endif
+
 __END_DECLS
 
 #include <android/legacy_strings_inlines.h>