diff --git a/src/ioc/db/dbUnitTest.c b/src/ioc/db/dbUnitTest.c
index 7764f78a8..a92f8de7d 100644
--- a/src/ioc/db/dbUnitTest.c
+++ b/src/ioc/db/dbUnitTest.c
@@ -196,7 +196,8 @@ void testdbGetArrFieldEqual(const char* pv, short dbfType, long nRequest, unsign
     const long vSize = dbValueSize(dbfType);
     const long nStore = vSize * nRequest;
     long status;
-    char *gbuf, *gstore, *pbuf = pbuf;
+    char *gbuf, *gstore;
+    const char *pbuf = pbufraw;
 
     if(dbNameToAddr(pv, &addr)) {
         testFail("Missing PV \"%s\"", pv);