diff --git a/src/libCom/osi/os/RTEMS/osdThread.c b/src/libCom/osi/os/RTEMS/osdThread.c
index 32a3d204e..4dc727944 100644
--- a/src/libCom/osi/os/RTEMS/osdThread.c
+++ b/src/libCom/osi/os/RTEMS/osdThread.c
@@ -27,6 +27,7 @@
 #include "epicsMutex.h"
 #include "epicsThread.h"
 #include "cantProceed.h"
+#include "osdInterrupt.h"
 
 /*
  * Per-task variables