diff --git a/graphics/seexpr/Makefile b/graphics/seexpr/Makefile
index 9f9c7722e04b..cb0f7973edaf 100644
--- a/graphics/seexpr/Makefile
+++ b/graphics/seexpr/Makefile
@@ -16,9 +16,10 @@ USE_GITHUB=	yes
 GH_ACCOUNT=	wdas
 GH_PROJECT=	SeExpr
 
-USES=		bison cmake compiler:c++0x pyqt:4 python
+USES=		bison cmake compiler:c++0x pyqt:4 python:2.7
 USE_PYQT=	gui_build sip_build
 USE_QT4=	moc_build qmake_build rcc_build uic_build gui opengl
+BINARY_ALIAS=	sip=sip-${PYTHON_VER}
 
 MAKE_JOBS_UNSAFE=	yes	# https://github.com/wdas/seexpr/issues/40