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-rw-r--r--cpukit/score/macros/rtems/score/object.inl2
1 files changed, 1 insertions, 1 deletions
diff --git a/cpukit/score/macros/rtems/score/object.inl b/cpukit/score/macros/rtems/score/object.inl
index 2865b1e23b..cce2cbde9b 100644
--- a/cpukit/score/macros/rtems/score/object.inl
+++ b/cpukit/score/macros/rtems/score/object.inl
@@ -62,7 +62,7 @@
*/
#define _Objects_Is_class_valid( _the_class ) \
- ( (_the_class) <= OBJECTS_CLASSES_LAST )
+ ( (_the_class) && (_the_class) <= OBJECTS_CLASSES_LAST )
/*PAGE
*