diff --git a/src/std/rec/boRecord.c b/src/std/rec/boRecord.c
index 88184555e..48cc4846a 100644
--- a/src/std/rec/boRecord.c
+++ b/src/std/rec/boRecord.c
@@ -329,9 +329,9 @@ static long get_enum_strs(DBADDR *paddr,struct dbr_enumStrs *pes)
     /*SETTING no_str=0 breaks channel access clients*/
     pes->no_str = 2;
     memset(pes->strs,'\0',sizeof(pes->strs));
-    strncpy(pes->strs[0],prec->znam,sizeof(prec->znam));
+    strncpy(pes->strs[0],prec->znam,sizeof(pes->strs[0]));
     if(*prec->znam!=0) pes->no_str=1;
-    strncpy(pes->strs[1],prec->onam,sizeof(prec->onam));
+    strncpy(pes->strs[1],prec->onam,sizeof(pes->strs[1]));
     if(*prec->onam!=0) pes->no_str=2;
     return(0);
 }
diff --git a/src/std/rec/stateRecord.c b/src/std/rec/stateRecord.c
index a052b0728..8170de7e9 100644
--- a/src/std/rec/stateRecord.c
+++ b/src/std/rec/stateRecord.c
@@ -98,7 +98,7 @@ static void monitor(stateRecord *prec)
     monitor_mask = recGblResetAlarms(prec);
     if(strncmp(prec->oval,prec->val,sizeof(prec->val))) {
         db_post_events(prec,&(prec->val[0]),monitor_mask|DBE_VALUE|DBE_LOG);
-	strncpy(prec->oval,prec->val,sizeof(prec->val));
+	strncpy(prec->oval,prec->val,sizeof(prec->oval));
     }
     return;
 }
diff --git a/src/std/rec/stringinRecord.c b/src/std/rec/stringinRecord.c
index db2f626f1..aac7d4e0f 100644
--- a/src/std/rec/stringinRecord.c
+++ b/src/std/rec/stringinRecord.c
@@ -120,7 +120,7 @@ static long init_record(stringinRecord *prec, int pass)
     if( pdset->init_record ) {
 	if((status=(*pdset->init_record)(prec))) return(status);
     }
-    strncpy(prec->oval, prec->val, sizeof(prec->val));
+    strncpy(prec->oval, prec->val, sizeof(prec->oval));
     return(0);
 }
 
@@ -160,7 +160,7 @@ static void monitor(stringinRecord *prec)
 
     if (strncmp(prec->oval, prec->val, sizeof(prec->val))) {
         monitor_mask |= DBE_VALUE | DBE_LOG;
-        strncpy(prec->oval, prec->val, sizeof(prec->val));
+        strncpy(prec->oval, prec->val, sizeof(prec->oval));
     }
 
     if (prec->mpst == stringinPOST_Always)
diff --git a/src/std/rec/stringoutRecord.c b/src/std/rec/stringoutRecord.c
index 2bca3228c..61d88f60f 100644
--- a/src/std/rec/stringoutRecord.c
+++ b/src/std/rec/stringoutRecord.c
@@ -122,7 +122,7 @@ static long init_record(stringoutRecord *prec, int pass)
     if( pdset->init_record ) {
 	if((status=(*pdset->init_record)(prec))) return(status);
     }
-    strncpy(prec->oval, prec->val, sizeof(prec->val));
+    strncpy(prec->oval, prec->val, sizeof(prec->oval));
     return(0);
 }
 
@@ -188,7 +188,7 @@ static void monitor(stringoutRecord *prec)
 
     if (strncmp(prec->oval, prec->val, sizeof(prec->val))) {
         monitor_mask |= DBE_VALUE | DBE_LOG;
-        strncpy(prec->oval, prec->val, sizeof(prec->val));
+        strncpy(prec->oval, prec->val, sizeof(prec->oval));
     }
 
     if (prec->mpst == stringoutPOST_Always)