diff --git a/src/ioc/db/dbLock.c b/src/ioc/db/dbLock.c
index c36301d35..d0f266795 100644
--- a/src/ioc/db/dbLock.c
+++ b/src/ioc/db/dbLock.c
@@ -328,7 +328,7 @@ int dbLockUpdateRefs(dbLocker *locker, int update)
 }
 
 void dbLockerPrepare(struct dbLocker *locker,
-                struct dbCommon **precs,
+                struct dbCommon * const *precs,
                 size_t nrecs)
 {
     size_t i;
@@ -348,7 +348,7 @@ void dbLockerPrepare(struct dbLocker *locker,
     dbLockUpdateRefs(locker, 1);
 }
 
-dbLocker *dbLockerAlloc(dbCommon **precs,
+dbLocker *dbLockerAlloc(dbCommon * const *precs,
                         size_t nrecs,
                         unsigned int flags)
 {
diff --git a/src/ioc/db/dbLock.h b/src/ioc/db/dbLock.h
index 9f2714057..1d6388ed3 100644
--- a/src/ioc/db/dbLock.h
+++ b/src/ioc/db/dbLock.h
@@ -27,7 +27,7 @@ typedef struct dbLocker dbLocker;
 epicsShareFunc void dbScanLock(struct dbCommon *precord);
 epicsShareFunc void dbScanUnlock(struct dbCommon *precord);
 
-epicsShareFunc dbLocker *dbLockerAlloc(struct dbCommon **precs,
+epicsShareFunc dbLocker *dbLockerAlloc(struct dbCommon * const *precs,
                                        size_t nrecs,
                                        unsigned int flags);
 
diff --git a/src/ioc/db/dbLockPvt.h b/src/ioc/db/dbLockPvt.h
index 8e19f3f31..f90d00617 100644
--- a/src/ioc/db/dbLockPvt.h
+++ b/src/ioc/db/dbLockPvt.h
@@ -96,7 +96,7 @@ epicsShareFunc void dbLockDecRef(lockSet *ls);
  * nrecs must be <=DBLOCKER_NALLOC.
  */
 void dbLockerPrepare(struct dbLocker *locker,
-                     struct dbCommon **precs,
+                     struct dbCommon * const *precs,
                      size_t nrecs);
 void dbLockerFinalize(dbLocker *);