diff --git a/src/dataset.jl b/src/dataset.jl
index 494fe00..8df8023 100644
--- a/src/dataset.jl
+++ b/src/dataset.jl
@@ -7,6 +7,11 @@ const Dataset_typedetect_rows = Dict{Tuple{String, String}, Union{Vector,Dict}}(
 function dataset(package_name::AbstractString, dataset_name::AbstractString)
     basename = joinpath(@__DIR__, "..", "data", package_name)
 
+    rdataname = joinpath(basename, string(dataset_name, ".RData"))
+    if isfile(rdataname)
+        return load(rdataname)[dataset_name]
+    end
+
     rdaname = joinpath(basename, string(dataset_name, ".rda"))
     if isfile(rdaname)
         return load(rdaname)[dataset_name]
diff --git a/src/update_doc.r b/src/update_doc.r
index c1b3ef6..aecda68 100644
--- a/src/update_doc.r
+++ b/src/update_doc.r
@@ -32,7 +32,7 @@ do_package_update <- function(data_dir, package_df, old_dataset_df, dataset_df,
     datasets <- dir(path = file.path(data_dir, package))
 
     # Trim filenames to dataset names
-    r <- "(.+)\\.(csv\\.gz|rda)$"
+    r <- "(.+)\\.(csv\\.gz|rda|RData)$"
     format_recognized <- grepl(r, datasets)
     if (!(all(format_recognized))) {
         stop("Unrecognized formats:\n",