diff --git a/GNUmakefiles/StdTools b/GNUmakefiles/StdTools
index c0c2e2de9ab3b8bc9365e2c906ee3e3b4bb6e165..d4c97032f9fa7d721083849a603bf432dc014bc7 100644
--- a/GNUmakefiles/StdTools
+++ b/GNUmakefiles/StdTools
@@ -236,5 +236,8 @@ SEP       = /
 # Filename extension separator character
 EXT       = .
 
+# Parent directory
+PARENT    = ..
+
 
 # EOF
diff --git a/Makefiles/StdTools b/Makefiles/StdTools
index 95bc11295b16743fc1547c148b2b08ad46a07462..6f3f537ca21e38a246e3c15f35add88b3709e8ab 100644
--- a/Makefiles/StdTools
+++ b/Makefiles/StdTools
@@ -160,5 +160,8 @@ SEP       = .
 # Filename extension separator character
 EXT       = /
 
+# Parent directory
+PARENT    = ^
+
 
 # EOF