diff --git a/lib/md5.c b/lib/md5.c
index ada2d37e6..8e580d8e4 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -84,6 +84,17 @@ static void MD5_Final(unsigned char digest[16], MD5_CTX * ctx)
 #    include <md5.h>
 #  endif
 
+#elif defined(__MAC_10_4) || defined(__IPHONE_5_0)
+
+/* For Apple operating systems: CommonCrypto has the functions we need.
+   The library's headers are even backward-compatible with OpenSSL's
+   headers as long as we define COMMON_DIGEST_FOR_OPENSSL first.
+
+   These functions are available on Tiger and later, as well as iOS 5.0
+   and later. If you're building for an older cat, well, sorry. */
+#  define COMMON_DIGEST_FOR_OPENSSL
+#  include <CommonCrypto/CommonDigest.h>
+
 #elif defined(_WIN32)
 
 #include <wincrypt.h>
diff --git a/src/tool_metalink.c b/src/tool_metalink.c
index cafa63fdf..16689a3c2 100644
--- a/src/tool_metalink.c
+++ b/src/tool_metalink.c
@@ -52,10 +52,10 @@
 #  define MD5_CTX    gcry_md_hd_t
 #  define SHA_CTX    gcry_md_hd_t
 #  define SHA256_CTX gcry_md_hd_t
-#elif defined(USE_DARWINSSL)
-/* For darwinssl: CommonCrypto has the functions we need. The library's
-   headers are even backward-compatible with OpenSSL's headers as long as
-   we define COMMON_DIGEST_FOR_OPENSSL first.
+#elif defined(__MAC_10_4) || defined(__IPHONE_5_0)
+/* For Apple operating systems: CommonCrypto has the functions we need.
+   The library's headers are even backward-compatible with OpenSSL's
+   headers as long as we define COMMON_DIGEST_FOR_OPENSSL first.
 
    These functions are available on Tiger and later, as well as iOS 5.0
    and later. If you're building for an older cat, well, sorry. */