diff --git a/NAMESPACE b/NAMESPACE
index 8a6ecb49..252b77dc 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -137,4 +137,5 @@ importFrom(stats,terms)
 importFrom(stats,update.formula)
 importFrom(stats,var)
 importFrom(tidyr,gather)
+importFrom(tidyr,replace_na)
 useDynLib(PLNmodels)