-hsSigFVs (TypeSig _ ty) = extractHsTyNames ty
-hsSigFVs (SpecInstSig ty) = extractHsTyNames ty
-hsSigFVs (SpecSig _ ty _) = extractHsTyNames ty
-hsSigFVs _ = emptyFVs
+hsSigFVs (TypeSig _ ty) = extractHsTyNames ty
+hsSigFVs (GenericSig _ ty) = extractHsTyNames ty
+hsSigFVs (SpecInstSig ty) = extractHsTyNames ty
+hsSigFVs (SpecSig _ ty _) = extractHsTyNames ty
+hsSigFVs _ = emptyFVs