diff --git a/src/hardware.c b/src/hardware.c
index 8bbd151..2241d4a 100644
--- a/src/hardware.c
+++ b/src/hardware.c
@@ -21,7 +21,15 @@
 
 #include "pll.h"
 
-#if (!defined(__clang__) && defined(__GNUC__) && (__GNUC__ < 4 || \
+/*
+    Apple machines should always default to assembly code due to
+    inconsistent versioning in LLVM/clang, see issue #138
+
+    https://github.com/xflouris/libpll/issues/138
+
+*/
+#if (defined(__APPLE__)) || \
+    (!defined(__clang__) && defined(__GNUC__) && (__GNUC__ < 4 || \
       (__GNUC__ == 4 && __GNUC_MINOR__ < 8))) || \
     (defined(__clang__) && (__clang_major__ < 3 || \
       (__clang_major__ == 3 && __clang_minor__ < 9)))