diff --git a/src/main/java/net/fortuna/ical4j/model/property/Attendee.java b/src/main/java/net/fortuna/ical4j/model/property/Attendee.java
index ea78adc12..f0f35981e 100644
--- a/src/main/java/net/fortuna/ical4j/model/property/Attendee.java
+++ b/src/main/java/net/fortuna/ical4j/model/property/Attendee.java
@@ -126,7 +126,7 @@ public final void validate() throws ValidationException {
                 Parameter.DIR, Parameter.LANGUAGE), new Closure<String>() {
             @Override
             public void execute(String input) {
-                PropertyValidator.getInstance().assertOneOrLess(input, getParameters());
+                ParameterValidator.getInstance().assertOneOrLess(input, getParameters());
             }
         });
 
diff --git a/src/main/java/net/fortuna/ical4j/model/property/Organizer.java b/src/main/java/net/fortuna/ical4j/model/property/Organizer.java
index 1106c94d6..9656c5cba 100644
--- a/src/main/java/net/fortuna/ical4j/model/property/Organizer.java
+++ b/src/main/java/net/fortuna/ical4j/model/property/Organizer.java
@@ -196,7 +196,7 @@ public final void validate() throws ValidationException {
                 Parameter.LANGUAGE), new Closure<String>() {
             @Override
             public void execute(String input) {
-                PropertyValidator.getInstance().assertOneOrLess(input, getParameters());
+                ParameterValidator.getInstance().assertOneOrLess(input, getParameters());
             }
         });