diff --git a/git-annex.cabal b/git-annex.cabal
index f806c7b264..568374b4ba 100644
--- a/git-annex.cabal
+++ b/git-annex.cabal
@@ -151,7 +151,7 @@ Executable git-annex
     CPP-Options: -DWITH_CRYPTOHASH
 
   if flag(S3)
-    Build-Depends: conduit, resourcet, conduit-extra, aws (>= 0.9.2)
+    Build-Depends: conduit, resourcet, conduit-extra, aws (>= 0.9.2), http-client
     CPP-Options: -DWITH_S3
 
   if flag(WebDAV)