diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/i18n/I18nBase.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/i18n/I18nBase.java
index ee2656c2b..73acd1ef9 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/i18n/I18nBase.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/i18n/I18nBase.java
@@ -14,7 +14,7 @@ public abstract class I18nBase {
 
   private Locale locale;
   private ResourceBundle i18nMessages;
-  private boolean warnAboutMissingMessages = false;
+  private boolean warnAboutMissingMessages = true;
 
   public Locale getLocale() {
     if (Objects.nonNull(locale)) {