diff --git a/cpukit/score/src/apimutex.c b/cpukit/score/src/apimutex.c
index eb0663d2a2..bb86e4746b 100644
--- a/cpukit/score/src/apimutex.c
+++ b/cpukit/score/src/apimutex.c
@@ -53,7 +53,7 @@ void _API_Mutex_Allocate(
 
   CORE_mutex_Attributes attr =  {
     CORE_MUTEX_NESTING_ACQUIRES,
-    false,
+    true,
     CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT,
     0
   };