diff --git a/qgroundcontrol.pro b/qgroundcontrol.pro
index 70ed65d6eda9a48dcce40bfec416e46e05cd1399..6458bfde96085753a2e0be7aad2c942b6f5d1dd8 100644
--- a/qgroundcontrol.pro
+++ b/qgroundcontrol.pro
@@ -230,7 +230,7 @@ SOURCES += src/main.cc \
 RESOURCES = mavground.qrc
 
 # Include RT-LAB Library
-win32 { 
+win32:exists(C:\OPAL-RT\RT-LAB7.2.4\Common\bin) {
     LIBS += -LC:\OPAL-RT\RT-LAB7.2.4\Common\bin \
         -lOpalApi
     INCLUDEPATH += src/lib/opalrt