diff --git a/python3/ExternalProject_python3.mk b/python3/ExternalProject_python3.mk
index b47f303da4a9..2bde4cf2c328 100644
--- a/python3/ExternalProject_python3.mk
+++ b/python3/ExternalProject_python3.mk
@@ -32,7 +32,7 @@ ifeq ($(VCVER),110)
 	&& touch $@
 else ifeq ($(VCVER),100)
 	cd $(EXTERNAL_WORKDIR)/PCbuild \
-	&& MAKEFLAGS= MSBuild.exe pcbuild.sln /t:Build /p:Configuration=Release /p:PlatformToolset=Windows7.1SDK /ToolsVersion:4.0 \
+	&& MAKEFLAGS= MSBuild.exe pcbuild.sln /t:Build /p:Configuration=Release /ToolsVersion:4.0 \
 	&& cd $(EXTERNAL_WORKDIR) \
 	&& ln -s PCbuild LO_lib \
 	&& touch $@