diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index dbd6f81..edf1548 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -133,7 +133,11 @@ if ( NOT APPLE )
     target_link_libraries(airplay PUBLIC ${DNSSD} )
   else()  # can also build if mDNSResponder or another implementation of dns_sd is present instead of Avahi
     if ( WIN32 )
-      set(BONJOUR_SDK "$ENV{BONJOUR_SDK_HOME}" )
+      if (DEFINED ENV{BONJOUR_SDK_HOME}) 
+        set(BONJOUR_SDK "$ENV{BONJOUR_SDK_HOME}" )
+      else()
+        set(BONJOUR_SDK "C:\\Program Files\\Bonjour SDK")
+      endif()
       message( STATUS "BONJOUR_SDK_HOME " ${BONJOUR_SDK} )
       set(DNSSD "${BONJOUR_SDK}/Lib/x64/dnssd.lib")
       target_link_libraries(airplay ${DNSSD} )