diff --git a/src/base/macros.h b/src/base/macros.h
index 52013da..48cb9c0 100644
--- a/src/base/macros.h
+++ b/src/base/macros.h
@@ -130,6 +130,12 @@
 #define LIKELY(x)       __builtin_expect((x), true)
 #define UNLIKELY(x)     __builtin_expect((x), false)
 
+#ifdef NDEBUG
+#define ALWAYS_INLINE
+#else
+#define ALWAYS_INLINE  __attribute__((always_inline))
+#endif
+
 // bionic and glibc both have TEMP_FAILURE_RETRY, but Mac OS' libc doesn't.
 #ifndef TEMP_FAILURE_RETRY
 #define TEMP_FAILURE_RETRY(exp) ({ \