diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h
index e68246e607..1e9b20757d 100644
--- a/src/corelib/global/qglobal.h
+++ b/src/corelib/global/qglobal.h
@@ -437,6 +437,8 @@ template <>    struct QIntegerForSize<2> { typedef quint16 Unsigned; typedef qin
 template <>    struct QIntegerForSize<4> { typedef quint32 Unsigned; typedef qint32 Signed; };
 template <>    struct QIntegerForSize<8> { typedef quint64 Unsigned; typedef qint64 Signed; };
 template <class T> struct QIntegerForSizeof: QIntegerForSize<sizeof(T)> { };
+typedef QIntegerForSize<Q_PROCESSOR_WORDSIZE>::Signed qregisterint;
+typedef QIntegerForSize<Q_PROCESSOR_WORDSIZE>::Unsigned qregisteruint;
 typedef QIntegerForSizeof<void*>::Unsigned quintptr;
 typedef QIntegerForSizeof<void*>::Signed qptrdiff;
 typedef qptrdiff qintptr;
diff --git a/src/corelib/global/qprocessordetection.h b/src/corelib/global/qprocessordetection.h
index 623e30aa06..a5eff7c7ce 100644
--- a/src/corelib/global/qprocessordetection.h
+++ b/src/corelib/global/qprocessordetection.h
@@ -196,6 +196,7 @@
 #  define Q_PROCESSOR_X86       6
 #  define Q_PROCESSOR_X86_64
 #  define Q_BYTE_ORDER Q_LITTLE_ENDIAN
+#  define Q_PROCESSOR_WORDSIZE   8
 
 /*
     Itanium (IA-64) family, no revisions or variants
@@ -204,6 +205,7 @@
 */
 #elif defined(__ia64) || defined(__ia64__) || defined(_M_IA64)
 #  define Q_PROCESSOR_IA64
+#  define Q_PROCESSOR_WORDSIZE   8
 // Q_BYTE_ORDER not defined, use endianness auto-detection
 
 /*
@@ -324,4 +326,23 @@
 #  endif
 #endif
 
+/*
+   Define Q_PROCESSOR_WORDSIZE to be the size of the machine's word (usually,
+   the size of the register). On some architectures where a pointer could be
+   smaller than the register, the macro is defined above.
+
+   Try our best to define it to a literal, so it can be used in the preprocessor,
+   but fall back to sizeof(void*) on practically every 32-bit build.
+*/
+#ifndef Q_PROCESSOR_WORDSIZE
+#  ifdef __SIZEOF_POINTER__
+     /* GCC & friends define this */
+#    define Q_PROCESSOR_WORDSIZE        __SIZEOF_POINTER__
+#  elif defined(_LP64) || defined(__LP64__) || defined(WIN64) || defined(_WIN64)
+#    define Q_PROCESSOR_WORDSIZE        8
+#  else
+#    define Q_PROCESSOR_WORDSIZE        sizeof(void*)
+#  endif
+#endif
+
 #endif // QPROCESSORDETECTION_H