diff --git a/PySide/QtCore/typesystem_core.xml b/PySide/QtCore/typesystem_core.xml
index 3376973..5b9ea30 100644
--- a/PySide/QtCore/typesystem_core.xml
+++ b/PySide/QtCore/typesystem_core.xml
@@ -108,26 +108,26 @@
   <primitive-type name="qreal"/>
   <primitive-type name="float"/>
   <primitive-type name="qint64"/>
-  <primitive-type name="unsigned long long"/>
-  <primitive-type name="long long"/>
+  <primitive-type name="unsigned long long" default-constructor="0"/>
+  <primitive-type name="long long" default-constructor="0"/>
   <primitive-type name="qlonglong" target-lang-api-name="PyLong" />
   <primitive-type name="qulonglong" target-lang-api-name="PyLong" />
   <primitive-type name="short"/>
-  <primitive-type name="signed short"/>
+  <primitive-type name="signed short" default-constructor="0"/>
   <primitive-type name="ushort" target-lang-api-name="PyInt" />
-  <primitive-type name="unsigned short"/>
+  <primitive-type name="unsigned short" default-constructor="0"/>
   <primitive-type name="char"/>
-  <primitive-type name="signed char"/>
+  <primitive-type name="signed char" default-constructor="0"/>
   <primitive-type name="uchar"/>
-  <primitive-type name="unsigned char"/>
+  <primitive-type name="unsigned char" default-constructor="0"/>
   <primitive-type name="int"/>
-  <primitive-type name="signed int"/>
+  <primitive-type name="signed int" default-constructor="0"/>
   <primitive-type name="uint"/>
   <primitive-type name="ulong"/>
-  <primitive-type name="unsigned int"/>
-  <primitive-type name="signed long"/>
+  <primitive-type name="unsigned int" default-constructor="0"/>
+  <primitive-type name="signed long" default-constructor="0"/>
   <primitive-type name="long"/>
-  <primitive-type name="unsigned long"/>
+  <primitive-type name="unsigned long" default-constructor="0"/>
   <primitive-type name="WId">
     <!-- FIXME This is a workaround to include some headers needed by some includes (nothing to do with QBool) -->
     <include file-name="signalmanager.h" location="global"/>