diff --git a/src/ThreadedFFI/TFBooleanType.class.st b/src/ThreadedFFI/TFBooleanType.class.st
index 7e41f26..b9e1f7b 100644
--- a/src/ThreadedFFI/TFBooleanType.class.st
+++ b/src/ThreadedFFI/TFBooleanType.class.st
@@ -7,7 +7,7 @@ Class {
 { #category : #accessing }
 TFBooleanType >> basicType [
 	
-	^ TFBasicType ushort
+	^ TFBasicType uint8
 ]
 
 { #category : #'reading-writing' }