diff --git a/include/missing.h b/include/missing.h
index a79782b54..014ce8939 100644
--- a/include/missing.h
+++ b/include/missing.h
@@ -140,7 +140,7 @@
 # endif
 #endif
 
-#ifndef ULONG_MAX
+#ifndef ULLONG_MAX
 # if defined(UQUAD_MAX)
 #  define ULLONG_MAX	UQUAD_MAX
 # else