diff --git a/fsw/cfe-core/ut-stubs/ut_es_stubs.c b/fsw/cfe-core/ut-stubs/ut_es_stubs.c
index f9c26c407..e000d1d48 100644
--- a/fsw/cfe-core/ut-stubs/ut_es_stubs.c
+++ b/fsw/cfe-core/ut-stubs/ut_es_stubs.c
@@ -970,7 +970,7 @@ int32 CFE_ES_RestoreFromCDS(void *RestoreToMemory, CFE_ES_CDSHandle_t Handle)
 **
 ******************************************************************************/
 int32 CFE_ES_RegisterCDSEx(CFE_ES_CDSHandle_t *HandlePtr,
-                           int32 BlockSize,
+                           CFE_ES_CDS_Offset_t UserBlockSize,
                            const char *Name,
                            bool CriticalTbl)
 {