diff --git a/programs/util.h b/programs/util.h
index fd07c348a..20fb493f4 100644
--- a/programs/util.h
+++ b/programs/util.h
@@ -325,7 +325,8 @@ UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_
     return nbFiles;
 }
 
-#elif (defined(__APPLE__) && defined(__MACH__)) || \
+#elif (defined(__APPLE__) && defined(__MACH__)) || defined(__SVR4) || \
+       defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
      ((defined(__unix__) || defined(__unix) || defined(__midipix__)) && defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L)) /* snprintf, opendir */
 #  define UTIL_HAS_CREATEFILELIST
 #  include <dirent.h>       /* opendir, readdir */