diff --git a/R/parseOSD_functions.R b/R/parseOSD_functions.R
index fa79642000..7de9ada200 100644
--- a/R/parseOSD_functions.R
+++ b/R/parseOSD_functions.R
@@ -207,8 +207,8 @@
 
 # vectorized parsing of effervescence class
 .parse_eff_class <- function(x) {
-  .zerochar_to_na(gsub("^.*[;,]? ?\\b([a-z]+ ?effervescen[tce]+ to [a-z]+ ?effervescen[tce]+).*$|^.*[;,] ?\\b(very [a-z]+ effervescen[tce]+).*$|^.*[;,] ?\\b([a-z]+ ?effervescen[tce]+).*$|^.*[;,]? ?\\b(very [a-z]+ effervescen[tce]+).*$|^.*[;,]? ?\\b([a-z]+ ?effervescen[tce]+).*$|.*",
-                                           "\\1\\2\\3\\4\\5", x, ignore.case = TRUE))
+  .zerochar_to_na(gsub("^.*[;,]? ?\\b([a-z]+ ?effervescen[tce]+ (to|and|or) [a-z]+ ?effervescen[tce]+).*$|^.*[;,] ?\\b(very [a-z]+ effervescen[tce]+).*$|^.*[;,] ?\\b([a-z]+ ?effervescen[tce]+).*$|^.*[;,]? ?\\b(very [a-z]+ effervescen[tce]+).*$|^.*[;,]? ?\\b([a-z]+ ?effervescen[tce]+).*$|.*",
+                                           "\\1\\3\\4\\5\\6", x, ignore.case = TRUE))
   # factors cannot be preserved in JSON output, and wont work for multiple classes/ranges of classes
 }