diff --git a/R/.Rbuildignore b/R/.Rbuildignore
index e148253..7f78a9d 100644
--- a/R/.Rbuildignore
+++ b/R/.Rbuildignore
@@ -2,3 +2,4 @@
 ^\.Rproj\.user$
 ^\.travis\.yml$
 ^appveyor\.yml$
+^data-raw$
diff --git a/R/R/REDCap_split.r b/R/R/REDCap_split.r
index 4e45901..14f499d 100644
--- a/R/R/REDCap_split.r
+++ b/R/R/REDCap_split.r
@@ -87,14 +87,7 @@ REDCap_split <- function(records, metadata) {
   }
 
   # Standardize variable names for metadata
-  names(metadata) <- c(
-    "field_name", "form_name", "section_header", "field_type",
-    "field_label", "select_choices_or_calculations", "field_note",
-    "text_validation_type_or_show_slider_number", "text_validation_min",
-    "text_validation_max", "identifier", "branching_logic", "required_field",
-    "custom_alignment", "question_number", "matrix_group_name", "matrix_ranking",
-    "field_annotation"
-  )
+  names(metadata) <- metadata_names
 
   # Make sure that no metadata columns are factors
   metadata <- rapply(metadata, as.character, classes = "factor", how = "replace")
diff --git a/R/R/sysdata.rda b/R/R/sysdata.rda
new file mode 100644
index 0000000..0299f29
Binary files /dev/null and b/R/R/sysdata.rda differ
diff --git a/R/data-raw/metadata_names.R b/R/data-raw/metadata_names.R
new file mode 100644
index 0000000..30d8c8c
--- /dev/null
+++ b/R/data-raw/metadata_names.R
@@ -0,0 +1,10 @@
+metadata_names <- c(
+  "field_name", "form_name", "section_header", "field_type",
+  "field_label", "select_choices_or_calculations", "field_note",
+  "text_validation_type_or_show_slider_number", "text_validation_min",
+  "text_validation_max", "identifier", "branching_logic", "required_field",
+  "custom_alignment", "question_number", "matrix_group_name", "matrix_ranking",
+  "field_annotation"
+)
+
+usethis::use_data(metadata_names, overwrite = TRUE, internal = TRUE)