diff --git a/kerncompat.h b/kerncompat.h
index 08133164..9fdc58e2 100644
--- a/kerncompat.h
+++ b/kerncompat.h
@@ -36,9 +36,13 @@
 #ifndef BTRFS_DISABLE_BACKTRACE
 #define BTRFS_DISABLE_BACKTRACE
 #endif
+
+#ifndef __always_inline
 #define __always_inline __inline __attribute__ ((__always_inline__))
 #endif
 
+#endif
+
 #ifndef BTRFS_DISABLE_BACKTRACE
 #include <execinfo.h>
 #endif