diff --git a/R/read_ext.R b/R/read_ext.R
index 62740733..8db2175c 100644
--- a/R/read_ext.R
+++ b/R/read_ext.R
@@ -90,7 +90,15 @@ read_text <- function(file, colnames = NULL, method = "fread",
   if (all(grepl("^X[0-9]*", names(dt))))
     stop("missing header: use 'header = FALSE' or an alternative read method",
          call. = F)
-  if(sum(grepl("^[0-9]{1,}$",colnames(dt))) > 4) {
+  #This is for the siMPle csv format. 
+  if(sum(c("WaveNumber", "Raw spectrum", "1st derivative", "2nd derivative") %in% names(dt)) > 2){
+      dt <- as.data.table(lapply(dt, as.numeric))
+      wavenumbers <- dt[["WaveNumber"]]
+      spectra <- dt[,-"WaveNumber"]
+      os <- as_OpenSpecy(x = as.numeric(wavenumbers), spectra = spectra,
+                         metadata = metadata)
+  }
+  else if(sum(grepl("^[0-9]{1,}$",colnames(dt))) > 4) {
     wavenumbers <- colnames(dt)[grepl("^[0-9]{1,}$",colnames(dt))]
     spectra <- transpose(dt[,wavenumbers, with = FALSE])
     metadata_names <- colnames(dt)[!grepl("^[0-9]{1,}$",colnames(dt))]