Index: cmake/CMakeLists.txt
===================================================================
--- cmake/CMakeLists.txt
+++ cmake/CMakeLists.txt
@@ -60,7 +60,7 @@
   if (NOT tgt_type STREQUAL "INTERFACE_LIBRARY")
     set(POLLY_EXPORTS
       "set_target_properties(${tgt} PROPERTIES
-              IMPORTED_LOCATION_$<UPPER_CASE:$<CONFIG>> $<TARGET_FILE:${tgt}>)
+              IMPORTED_LOCATION$<$<NOT:$<CONFIG:>>:_<UPPER_CASE:$<CONFIG>> $<TARGET_FILE:${tgt}>)
 ${POLLY_EXPORTS}")
   endif()
 endforeach(tgt)