diff --git a/libs/piqt/piqt.h b/libs/piqt/piqt.h
index 75157ef..0a823a1 100644
--- a/libs/piqt/piqt.h
+++ b/libs/piqt/piqt.h
@@ -207,7 +207,7 @@ _PIQt_CONVERT(PIMathVectorT3d, QVector3D, PI2QVector3, Q2PIVector3)
 
 
 
-#if PIP_VERSION < PIP_MAKE_VERSION(2,90,0)
+#ifndef PIP_BINARY_STREAM
 
 inline PIByteArray & operator <<(PIByteArray & s, const QString & v) {s << Q2PIString(v); return s;}
 inline PIByteArray & operator >>(PIByteArray & s,       QString & v) {PIString t; s >> t; v = PI2QString(t); return s;}