diff --git a/src/backend/utils/adt/rangetypes.c b/src/backend/utils/adt/rangetypes.c
index 490bc2ae81..412322c6fa 100644
--- a/src/backend/utils/adt/rangetypes.c
+++ b/src/backend/utils/adt/rangetypes.c
@@ -49,7 +49,6 @@
 typedef struct RangeIOData
 {
 	TypeCacheEntry *typcache;	/* range type's typcache entry */
-	Oid			typiofunc;		/* element type's I/O function */
 	Oid			typioparam;		/* element type's I/O parameter */
 	FmgrInfo	proc;			/* lookup result for typiofunc */
 } RangeIOData;
@@ -309,6 +308,7 @@ get_range_io_data(FunctionCallInfo fcinfo, Oid rngtypid, IOFuncSelector func)
 		bool		typbyval;
 		char		typalign;
 		char		typdelim;
+		Oid			typiofunc;
 
 		cache = (RangeIOData *) MemoryContextAlloc(fcinfo->flinfo->fn_mcxt,
 												   sizeof(RangeIOData));
@@ -324,9 +324,9 @@ get_range_io_data(FunctionCallInfo fcinfo, Oid rngtypid, IOFuncSelector func)
 						 &typalign,
 						 &typdelim,
 						 &cache->typioparam,
-						 &cache->typiofunc);
+						 &typiofunc);
 
-		if (!OidIsValid(cache->typiofunc))
+		if (!OidIsValid(typiofunc))
 		{
 			/* this could only happen for receive or send */
 			if (func == IOFunc_receive)
@@ -340,7 +340,7 @@ get_range_io_data(FunctionCallInfo fcinfo, Oid rngtypid, IOFuncSelector func)
 						 errmsg("no binary output function available for type %s",
 								format_type_be(cache->typcache->rngelemtype->type_id))));
 		}
-		fmgr_info_cxt(cache->typiofunc, &cache->proc,
+		fmgr_info_cxt(typiofunc, &cache->proc,
 					  fcinfo->flinfo->fn_mcxt);
 
 		fcinfo->flinfo->fn_extra = (void *) cache;