diff --git a/History.md b/History.md
index 95874e62..15d75e77 100644
--- a/History.md
+++ b/History.md
@@ -4,6 +4,7 @@
 - Import of ZF1 invoices (thanks to Stefan Schmaltz https://github.com/ZUGFeRD/mustangproject/pull/292) 
 - works again in Java 1.8 (#286)
 - updated Jackson https://github.com/ZUGFeRD/mustangproject/pull/293
+- now also running EN16931 checks on Basic, which apparently is also a CIUS 
 
 2.5.6
 =======
diff --git a/validator/src/main/java/org/mustangproject/validator/XMLValidator.java b/validator/src/main/java/org/mustangproject/validator/XMLValidator.java
index 21498c2b..4ba5838c 100644
--- a/validator/src/main/java/org/mustangproject/validator/XMLValidator.java
+++ b/validator/src/main/java/org/mustangproject/validator/XMLValidator.java
@@ -333,7 +333,7 @@ public class XMLValidator extends Validator {
 				if (context.getFormat().equals("CII")) {
 
 					if (context.getGeneration().equals("2")
-							&& (isEN16931 || isXRechnung)) {
+							&& (isBasic || isEN16931 || isXRechnung)) {
 						//additionally validate against CEN
 						validateSchematron(zfXML, "/xslt/cii16931schematron/EN16931-CII-validation.xslt", 24, ESeverity.error);
 						if (!disableNotices || XrechnungSeverity != ESeverity.notice) {