diff --git a/src/libCom/osi/os/RTEMS/osdThread.c b/src/libCom/osi/os/RTEMS/osdThread.c
index 898dc9422..fd9f68783 100644
--- a/src/libCom/osi/os/RTEMS/osdThread.c
+++ b/src/libCom/osi/os/RTEMS/osdThread.c
@@ -360,7 +360,7 @@ epicsThreadIsSuspended (epicsThreadId id)
 
     default:
         errlogPrintf("epicsThreadIsSuspended: %s\n", rtems_status_text (sc));
-        return 0;
+        return 1;
     }
 }