diff --git a/indra/llmessage/aicurl.cpp b/indra/llmessage/aicurl.cpp
index 71d9397d5..b3c6f640b 100644
--- a/indra/llmessage/aicurl.cpp
+++ b/indra/llmessage/aicurl.cpp
@@ -127,7 +127,7 @@ void ssl_locking_function(int mode, int n, char const* file, int line)
 // OpenSSL uniq id function.
 void ssl_id_function(CRYPTO_THREADID* thread_id)
 {
-#if LL_WINDOWS	// apr_os_thread_current() returns a pointer,
+#if LL_WINDOWS || LL_DARWIN	// apr_os_thread_current() returns a pointer,
   CRYPTO_THREADID_set_pointer(thread_id, apr_os_thread_current());
 #else			// else it returns an unsigned long.
   CRYPTO_THREADID_set_numeric(thread_id, apr_os_thread_current());