1 files changed, 19 insertions, 4 deletions
diff --git a/c/src/exec/posix/src/mutex.c b/c/src/exec/posix/src/mutex.c
index 51ac6e097c..a3b81da52d 100644
--- a/c/src/exec/posix/src/mutex.c
+++ b/c/src/exec/posix/src/mutex.c
@@ -151,8 +151,15 @@ int pthread_mutexattr_setpshared(
   if ( !attr )
     return EINVAL;
 
-  attr->process_shared = pshared;
-  return 0;
+  switch ( pshared ) {
+    case PTHREAD_PROCESS_SHARED:
+    case PTHREAD_PROCESS_PRIVATE:
+      attr->process_shared = pshared;
+      return 0;
+
+    default:
+      return EINVAL;
+  }
 }
 
 /*PAGE
@@ -466,8 +473,16 @@ int pthread_mutexattr_setprotocol(
   if ( !attr )
     return EINVAL;
 
-  attr->protocol = protocol;
-  return 0;
+  switch ( protocol ) {
+    case PTHREAD_PRIO_NONE:
+    case PTHREAD_PRIO_INHERIT:
+    case PTHREAD_PRIO_PROTECT:
+      attr->protocol = protocol;
+      return 0;
+ 
+    default:
+      return EINVAL;
+  }
 }
 
 /*PAGE