diff --git a/R/DESCRIPTION b/R/DESCRIPTION
index 3163f9a..275ba9d 100644
--- a/R/DESCRIPTION
+++ b/R/DESCRIPTION
@@ -14,7 +14,8 @@ Suggests:
     httr,
     jsonlite,
     testthat,
-    Hmisc
+    Hmisc,
+    readr
 License: GPL-3
 Encoding: UTF-8
 LazyData: true
diff --git a/R/R/REDCap_split.r b/R/R/REDCap_split.r
index d28a26a..685c1ed 100644
--- a/R/R/REDCap_split.r
+++ b/R/R/REDCap_split.r
@@ -89,6 +89,10 @@ REDCap_split <- function(records,
   records  <- process_user_input(records)
   metadata <- process_user_input(metadata)
 
+  # Remove "tbl_df" class from metadata, if present, due to difference in
+  # `[.tbl_df` behavior as compared to `[.data.frame` behavior (see issue #12)
+  if(inherits(metadata, "tbl_df")) class(metadata) <- "data.frame"
+
   # Get the variable names in the dataset
   vars_in_data <- names(records)
 
@@ -100,6 +104,15 @@ REDCap_split <- function(records,
     stop("There are no repeating instruments in this dataset.")
   }
 
+  # Remove NAs from `redcap_repeat_instrument` (see issue #12)
+  if(any(is.na(records$redcap_repeat_instrument))) {
+    records$redcap_repeat_instrument <- ifelse(
+      is.na(records$redcap_repeat_instrument),
+      "",
+      as.character(records$redcap_repeat_instrument)
+    )
+  }
+
   # Standardize variable names for metadata
   names(metadata) <- metadata_names
 
diff --git a/R/tests/testthat/test-readr.R b/R/tests/testthat/test-readr.R
new file mode 100644
index 0000000..1781eb5
--- /dev/null
+++ b/R/tests/testthat/test-readr.R
@@ -0,0 +1,22 @@
+if (requireNamespace("readr", quietly = TRUE)) {
+
+  context("Compatibility with readr")
+
+  metadata <- readr::read_csv(
+    get_data_location(
+      "ExampleProject_DataDictionary_2018-06-07.csv"
+    )
+  )
+
+  records <- readr::read_csv(
+    get_data_location(
+      "ExampleProject_DATA_2018-06-07_1129.csv"
+    )
+  )
+
+  test_that("Data read in with `readr` will return correct result", {
+    redcap_output_readr <- REDCap_split(records, metadata)
+    expect_known_hash(redcap_output_readr, "bde303d330fba161ca500c10cfabb693")
+  })
+
+}