diff --git a/buildconfig/CMake/FindPoco.cmake b/buildconfig/CMake/FindPoco.cmake
index cbe75f2635c97070d94a5777797c9d3fccad44c3..ee63f6bd96ec1ff342a8c5b16bf02898e92f40d0 100644
--- a/buildconfig/CMake/FindPoco.cmake
+++ b/buildconfig/CMake/FindPoco.cmake
@@ -22,7 +22,7 @@ find_library ( POCO_LIB_NETSSL_DEBUG NAMES PocoNetSSLd )
 function( add_poco_lib POCO_LIB_MODULE POCO_DEBUG_LIB_MODULE )
   # Add poco library to list and also the corresponding debug library if it is available
 
-  if ( POCO_DEBUG_LIB_MODULE )
+  if ( EXISTS "${POCO_DEBUG_LIB_MODULE}" )
     set ( POCO_LIBRARIES ${POCO_LIBRARIES}
         optimized ${POCO_LIB_MODULE}
         debug ${POCO_DEBUG_LIB_MODULE}