diff --git a/src/CHANGELOG b/src/CHANGELOG
index 3bd2c0b54..02a47ca42 100755
--- a/src/CHANGELOG
+++ b/src/CHANGELOG
@@ -1,6 +1,10 @@
 ECL 13.4.1
 ==========
 
+* Visible changes:
+
+- ECL now reports #+UNIX for all compatible systems, including *BSD ones.
+
 * Compiler fixes:
 
 - Minor readability improvements in the C code.
diff --git a/src/c/ecl_features.h b/src/c/ecl_features.h
index 6368fa32d..8d82a3cc9 100644
--- a/src/c/ecl_features.h
+++ b/src/c/ecl_features.h
@@ -42,7 +42,8 @@ ecl_def_string_array(feature_names,static,const) = {
 	ecl_def_string_array_elt("OLD-LOOP"),
 #endif
 	ecl_def_string_array_elt("ECL-PDE"),
-#ifdef unix
+#if defined(unix) || defined(netbsd) || defined(openbsd) || defined(linux) || defined(darwin) || \
+	defined(freebsd) || defined(dragonfly) || defined(kfreebsd) || defined(gnu) || defined(nsk)
 	ecl_def_string_array_elt("UNIX"),
 #endif
 #ifdef BSD