diff --git include/features.h include/features.h
index 972cbd2..aa1bad8 100644
--- include/features.h
+++ include/features.h
@@ -209,13 +209,11 @@
 # define _ATFILE_SOURCE	1
 #endif
 
-/* If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
-   define _DEFAULT_SOURCE.  */
-#if (defined _DEFAULT_SOURCE					\
-     || (!defined __STRICT_ANSI__				\
+/* If nothing is defined, define _DEFAULT_SOURCE.  */
+#if (!defined __STRICT_ANSI__				\
 	 && !defined _ISOC99_SOURCE				\
 	 && !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE	\
-	 && !defined _XOPEN_SOURCE))
+	 && !defined _XOPEN_SOURCE)
 # undef  _DEFAULT_SOURCE
 # define _DEFAULT_SOURCE	1
 #endif