diff --git a/R/first_isolates.R b/R/first_isolates.R
index 6f6c49f8..c8d8bbe0 100644
--- a/R/first_isolates.R
+++ b/R/first_isolates.R
@@ -321,11 +321,12 @@ first_isolate <- function(tbl,
                    , points_threshold, ')...\n'))
       }
     }
+    type_param <- type
     all_first <- all_first %>%
       mutate(key_ab_lag = lag(key_ab)) %>%
       mutate(key_ab_other = !key_antibiotics_equal(x = key_ab,
                                                    y = key_ab_lag,
-                                                   type = type,
+                                                   type = type_param,
                                                    ignore_I = ignore_I,
                                                    points_threshold = points_threshold,
                                                    info = info)) %>%
@@ -524,9 +525,9 @@ key_antibiotics_equal <- function(x,
                                   points_threshold = 2, 
                                   info = FALSE) {
   # x is active row, y is lag
-  
-  type <- type[1]
 
+  type <- type[1]
+  
   if (length(x) != length(y)) {
     stop('Length of `x` and `y` must be equal.')
   }
@@ -594,7 +595,7 @@ key_antibiotics_equal <- function(x,
         result[i] <- all(x2 == y2)
         
       } else {
-        stop('No valid value for type, must be `points` or `keyantibiotics`. See ?first_isolate.')
+        stop('`', type, '` is not a valid value for type, must be `points` or `keyantibiotics`. See ?first_isolate.')
       }
     }
   }
diff --git a/README.md b/README.md
index 67a257eb..9c869851 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ This package is available on CRAN and also here on GitHub.
 [![CRAN_Downloads](https://cranlogs.r-pkg.org/badges/grand-total/AMR)](http://cran.r-project.org/package=AMR)
 [![CRAN_Downloads](https://cranlogs.r-pkg.org/badges/AMR)](http://cran.r-project.org/package=AMR)
 
-- <img src="https://cran.r-project.org/favicon.ico" alt="R favicon" height="20px">In R:
+- <img src="https://cran.r-project.org/favicon.ico" alt="R favicon" height="20px"> In R:
   - `install.packages("AMR")`
   
 - <img src="http://www.rstudio.com/favicon.ico" alt="RStudio favicon" height="20px"> In RStudio: