diff --git a/CHANGES b/CHANGES
index 60b38dc31c..9af379669c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+1074.	[bug]		Running out of memory in dump_rdataset() could
+			cause an assertion failure. [RT #1946]
+
 1073.	[bug]		The adb cache should also be space driven,
 			max-adb-size.  [RT #1915, #1938]
 
diff --git a/lib/dns/masterdump.c b/lib/dns/masterdump.c
index 5956dcce65..0d1e562c0b 100644
--- a/lib/dns/masterdump.c
+++ b/lib/dns/masterdump.c
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: masterdump.c,v 1.60 2001/10/23 01:49:32 gson Exp $ */
+/* $Id: masterdump.c,v 1.61 2001/10/25 23:18:05 gson Exp $ */
 
 #include <config.h>
 
@@ -717,11 +717,11 @@ dump_rdataset(isc_mem_t *mctx, dns_name_t *name, dns_rdataset_t *rdataset,
 		if (result != ISC_R_NOSPACE)
 			break;
 
-		isc_mem_put(mctx, buffer->base, buffer->length);
 		newlength = buffer->length * 2;
 		newmem = isc_mem_get(mctx, newlength);
 		if (newmem == NULL)
 			return (ISC_R_NOMEMORY);
+		isc_mem_put(mctx, buffer->base, buffer->length);
 		isc_buffer_init(buffer, newmem, newlength);
 	}
 	if (result != ISC_R_SUCCESS)