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-rw-r--r--cpukit/posix/src/mutex.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/cpukit/posix/src/mutex.c b/cpukit/posix/src/mutex.c
index e6feda5864..d2c0c6cd2c 100644
--- a/cpukit/posix/src/mutex.c
+++ b/cpukit/posix/src/mutex.c
@@ -506,7 +506,7 @@ int pthread_mutexattr_setprotocol(
int protocol
)
{
- if ( !attr )
+ if ( !attr || !attr->is_initialized )
return EINVAL;
switch ( protocol ) {