diff --git a/.Rbuildignore b/.Rbuildignore
index 8b9b94f..5ee7385 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -1,5 +1,6 @@
 ^nlmixrtargets\.Rproj$
 ^\.Rproj\.user$
+^LICENSE$
 ^LICENSE\.md$
 ^README\.Rmd$
 ^cran-comments\.md$
diff --git a/R/simplify.R b/R/simplify.R
index e3dace6..5853d9f 100644
--- a/R/simplify.R
+++ b/R/simplify.R
@@ -43,7 +43,7 @@ nlmixr_object_simplify_zero_initial <- function(object) {
 }
 
 nlmixr_object_simplify_zero_initial_helper <- function(object) {
-  if (rxode2:::.matchesLangTemplate(object, str2lang(".name(initial) <- ."))) {
+  if (rxode2::.matchesLangTemplate(object, str2lang(".name(initial) <- ."))) {
     object[[2]][[2]] <- 0
   } else if (is.call(object)) {
     for (idx in seq_along(object)) {