diff --git a/pip b/pip
index 1045b27..478f0a7 160000
--- a/pip
+++ b/pip
@@ -1 +1 @@
-Subproject commit 1045b274fb430286dc09a06b4ab2bfe29e53c889
+Subproject commit 478f0a7fd3b9b39c53080a524536102fd72c8407
diff --git a/qglengine/core/gltypes.h b/qglengine/core/gltypes.h
index d00d63f..df9e232 100644
--- a/qglengine/core/gltypes.h
+++ b/qglengine/core/gltypes.h
@@ -128,6 +128,7 @@ inline float randomu() {return float(random()) / RAND_MAX;}
 
 inline const QSizeF operator *(const QSizeF & f, const QSizeF & s) {return QSizeF(f.width() * s.width(), f.height() * s.height());}
 #ifndef PIP_VERSION
+template<typename T> inline void piSwap(T & f, T & s) {T t(f); f = s; s = t;}
 template<typename Type> inline Type piMin(const Type & f, const Type & s) {return (f > s) ? s : f;}
 template<typename Type> inline Type piMin(const Type & f, const Type & s, const Type & t) {return (f < s && f < t) ? f : ((s < t) ? s : t);}
 template<typename Type> inline Type piMax(const Type & f, const Type & s) {return (f < s) ? s : f;}
diff --git a/qglview/gltypes.h b/qglview/gltypes.h
index 842d20e..00cf1b5 100644
--- a/qglview/gltypes.h
+++ b/qglview/gltypes.h
@@ -127,6 +127,7 @@ inline float randomu() {return float(random()) / RAND_MAX;}
 
 inline const QSizeF operator *(const QSizeF & f, const QSizeF & s) {return QSizeF(f.width() * s.width(), f.height() * s.height());}
 #ifndef PIP_VERSION
+template<typename T> inline void piSwap(T & f, T & s) {T t(f); f = s; s = t;}
 template<typename Type> inline Type piMin(const Type & f, const Type & s) {return (f > s) ? s : f;}
 template<typename Type> inline Type piMin(const Type & f, const Type & s, const Type & t) {return (f < s && f < t) ? f : ((s < t) ? s : t);}
 template<typename Type> inline Type piMax(const Type & f, const Type & s) {return (f < s) ? s : f;}