diff --git a/git-annex.cabal b/git-annex.cabal
index 7b88680298..780d66a1ea 100644
--- a/git-annex.cabal
+++ b/git-annex.cabal
@@ -423,7 +423,7 @@ Executable git-annex
           if (! os(solaris) && ! os(linux))
             CPP-Options: -DWITH_KQUEUE
             C-Sources: Utility/libkqueue.c
-	    Includes: Utility/libkqueue.h
+            Includes: Utility/libkqueue.h
             Other-Modules: Utility.DirWatcher.Kqueue
 
   if flag(Dbus)