diff --git a/CMakeModules/FindInventor.cmake b/CMakeModules/FindInventor.cmake
index a3f14d0aa..1cdd026e0 100644
--- a/CMakeModules/FindInventor.cmake
+++ b/CMakeModules/FindInventor.cmake
@@ -53,7 +53,7 @@ FIND_LIBRARY(INVENTOR_LIBRARY_DEBUG
 )
 IF(NOT INVENTOR_LIBRARY_DEBUG)
     IF(INVENTOR_LIBRARY)
-        SET(INVENTOR_LIBRARY_DEBUG INVENTOR_LIBRARY)
+        SET(INVENTOR_LIBRARY_DEBUG ${INVENTOR_LIBRARY})
     ENDIF(INVENTOR_LIBRARY)
 ENDIF(NOT INVENTOR_LIBRARY_DEBUG)