diff --git a/.XCompose b/.XCompose
index 3519b83..7401376 100644
--- a/.XCompose
+++ b/.XCompose
@@ -1,3 +1,4 @@
+# include system defaults
 include "%L"
 
 # greek alphabet small
@@ -53,3 +54,5 @@ include "%L"
 <Multi_key> <asciicircum> <x>           : "ˣ"   U02E3     # MODIFIER LETTER SMALL X
 <Multi_key> <asciicircum> <y>           : "ʸ"   U02B8     # MODIFIER LETTER SMALL Y
 <Multi_key> <asciicircum> <z>           : "ᶻ"   U1DBB     # MODIFIER LETTER SMALL Z
+
+<Multi_key> <space> <space>             : "\x09" U0009    # CHARACTER TABULATION