diff --git a/README.md b/README.md
index 963733a..968a6ec 100755
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ make install
 Alternatively build as static library (best for portability)  
 ```shell
 mkdir build && cd build
-qmake CONFIG+=static_lib ..
+qmake CONFIG+=staticlib ..
 make install
 ```
 
diff --git a/build_msvc.bat b/build_msvc.bat
index 4a9aba7..fdc33ba 100644
--- a/build_msvc.bat
+++ b/build_msvc.bat
@@ -39,7 +39,7 @@ SET PROJDIR=%CD%
 SET BUILDDIR=%PROJDIR%\..\build-qtusb-%ARCH%
 
 SET STATIC=""
-IF "%LIBTYPE%" == "static" SET STATIC="CONFIG+=static_lib"
+IF "%LIBTYPE%" == "static" SET STATIC="CONFIG+=staticlib"
 
 CALL "C:\Program Files (x86)\Microsoft Visual Studio\%MSVC%\Community\VC\Auxiliary\Build\vcvarsall.bat" %vcarch%
 
diff --git a/src/usb/usb.pro b/src/usb/usb.pro
index d0e2414..9f857d1 100755
--- a/src/usb/usb.pro
+++ b/src/usb/usb.pro
@@ -7,9 +7,8 @@ DEFINES += QT_BUILD_USB_LIB
 
 include($$PWD/usb-lib.pri)
 
-CONFIG(static_lib) {
+CONFIG(staticlib) {
     message("Build as Qt module (static library)")
-    CONFIG += staticlib
 } else {
     message("Build as Qt module (dynamic library)")
 }