diff --git a/src/vim.h b/src/vim.h
index 55bb7cd..21832ab 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -2177,13 +2177,15 @@
 #endif
 
 #if defined(__GNUC__) || defined(__clang__)
-# define likely(x)      __builtin_expect((x), 1)
-# define unlikely(x)    __builtin_expect((x), 0)
-# define ATTRIBUTE_COLD __attribute__((cold))
+# define likely(x)		__builtin_expect((x), 1)
+# define unlikely(x)		__builtin_expect((x), 0)
+# define ATTRIBUTE_COLD		__attribute__((cold))
+# define ATTRIBUTE_NORETURN	__attribute__((noreturn))
 #else
-# define unlikely(x)  (x)
-# define likely(x)    (x)
+# define unlikely(x)	(x)
+# define likely(x)	(x)
 # define ATTRIBUTE_COLD
+# define ATTRIBUTE_NORETURN
 #endif
 
 typedef enum {