diff --git a/src/base/macros.h b/src/base/macros.h
index 48cb9c0..3a24c08 100644
--- a/src/base/macros.h
+++ b/src/base/macros.h
@@ -130,10 +130,10 @@
 #define LIKELY(x)       __builtin_expect((x), true)
 #define UNLIKELY(x)     __builtin_expect((x), false)
 
-#ifdef NDEBUG
+#ifndef NDEBUG
 #define ALWAYS_INLINE
 #else
-#define ALWAYS_INLINE  __attribute__((always_inline))
+#define ALWAYS_INLINE  __attribute__ ((always_inline))
 #endif
 
 // bionic and glibc both have TEMP_FAILURE_RETRY, but Mac OS' libc doesn't.