diff --git a/lib/md5.c b/lib/md5.c
index 57efa431b52e48d8a1dcf658407c59a27c12d141..1c201f321f127e6175f2283763685b9e9c18269b 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -90,13 +90,16 @@ static void MD5_Final(unsigned char digest[16], MD5_CTX * ctx)
 #    include <md5.h>
 #  endif
 
-#elif defined(__MAC_10_4) || defined(__IPHONE_5_0)
+#elif (defined(__MAC_OS_X_VERSION_MAX_ALLOWED) && \
+              (__MAC_OS_X_VERSION_MAX_ALLOWED >= 1040)) || \
+      (defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && \
+              (__IPHONE_OS_VERSION_MAX_ALLOWED >= 20000))
 
 /* 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
+   These functions are available on Tiger and later, as well as iOS 2.0
    and later. If you're building for an older cat, well, sorry. */
 #  define COMMON_DIGEST_FOR_OPENSSL
 #  include <CommonCrypto/CommonDigest.h>
diff --git a/src/tool_metalink.c b/src/tool_metalink.c
index f9e9869b2d059ab48921ba0152a984209bf6f4ec..be5fc26c46d8a395bd5fc54ba7305c55384947bd 100644
--- a/src/tool_metalink.c
+++ b/src/tool_metalink.c
@@ -57,12 +57,15 @@
 #  ifdef HAVE_NSS_INITCONTEXT
      static NSSInitContext *nss_context;
 #  endif
-#elif defined(__MAC_10_4) || defined(__IPHONE_5_0)
+#elif (defined(__MAC_OS_X_VERSION_MAX_ALLOWED) && \
+              (__MAC_OS_X_VERSION_MAX_ALLOWED >= 1040)) || \
+      (defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && \
+              (__IPHONE_OS_VERSION_MAX_ALLOWED >= 20000))
 /* 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
+   These functions are available on Tiger and later, as well as iOS 2.0
    and later. If you're building for an older cat, well, sorry. */
 #  define COMMON_DIGEST_FOR_OPENSSL
 #  include <CommonCrypto/CommonDigest.h>