diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
index 172d05b..1fce07f 100644
--- a/ConfigureChecks.cmake
+++ b/ConfigureChecks.cmake
@@ -91,7 +91,7 @@ if( BUILD_NOATUN_PLUGINS )
   if( WITH_BERKELEY_DB )
     find_path( BERKELEY_DB_INCLUDE_DIRS db_cxx.h )
     find_library( BERKELEY_DB_LIBS db_cxx )
-    if( BERKELEY_DB_INCLUDE_DIRS-NOTFOUND OR BERKELEY_DB_LIBS-NOTFOUND )
+    if( BERKELEY_DB_INCLUDE_DIRS STREQUAL BERKELEY_DB_INCLUDE_DIRS-NOTFOUND OR BERKELEY_DB_LIBS STREQUAL BERKELEY_DB_LIBS-NOTFOUND )
       tde_message_fatal( "BerkeleyDB is requested, but was not found on your system" )
     endif( )
   endif( WITH_BERKELEY_DB )