diff --git a/cpukit/posix/src/pthreadcreate.c b/cpukit/posix/src/pthreadcreate.c
index b70be00217..211b2cf1a1 100644
--- a/cpukit/posix/src/pthreadcreate.c
+++ b/cpukit/posix/src/pthreadcreate.c
@@ -137,6 +137,7 @@ int pthread_create(
         &schedparam
       );
       _Assert( error == 0 );
+      (void) error; /* error only used when debug enabled */
       break;
 
     case PTHREAD_EXPLICIT_SCHED: