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-rw-r--r--haddock-api/src/Haddock/Backends/Xhtml.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/haddock-api/src/Haddock/Backends/Xhtml.hs b/haddock-api/src/Haddock/Backends/Xhtml.hs
index 4e87d0be..f80a9c05 100644
--- a/haddock-api/src/Haddock/Backends/Xhtml.hs
+++ b/haddock-api/src/Haddock/Backends/Xhtml.hs
@@ -307,6 +307,7 @@ ppPrologue pkg qual title (Just doc) =
ppSignatureTree :: Maybe Package -> Qualification -> [ModuleTree] -> Html
+ppSignatureTree _ _ [] = mempty
ppSignatureTree pkg qual ts =
divModuleList << (sectionName << "Signatures" +++ mkNodeList pkg qual [] "n" ts)