diff --git a/git-annex.cabal b/git-annex.cabal
index 4050ad3a50..e189e49459 100644
--- a/git-annex.cabal
+++ b/git-annex.cabal
@@ -333,14 +333,12 @@ Executable git-annex
       P2P.Http.State
 
   if flag(OsPath)
-    -- Currently this build flag does not pass the test suite on Windows
-    if (! os(windows))
-      Build-Depends:
-        os-string (>= 2.0.0),
-        directory (>= 1.3.8.3),
-        filepath (>= 1.5.2.0),
-        file-io (>= 0.1.3)
-      CPP-Options: -DWITH_OSPATH
+    Build-Depends:
+      os-string (>= 2.0.0),
+      directory (>= 1.3.8.3),
+      filepath (>= 1.5.2.0),
+      file-io (>= 0.1.3)
+    CPP-Options: -DWITH_OSPATH
 
   if (os(windows))
     Build-Depends: