diff --git a/storage/innobase/ibuf/ibuf0ibuf.c b/storage/innobase/ibuf/ibuf0ibuf.c
index 46a8d5b744c..de883ee26b6 100644
--- a/storage/innobase/ibuf/ibuf0ibuf.c
+++ b/storage/innobase/ibuf/ibuf0ibuf.c
@@ -56,6 +56,7 @@ Created 7/19/1997 Heikki Tuuri
 #include "log0recv.h"
 #include "que0que.h"
 #include "srv0start.h" /* srv_shutdown_state */
+#include "rem0cmp.h"
 
 /*	STRUCTURE OF AN INSERT BUFFER RECORD
 
@@ -3824,11 +3825,13 @@ skip_watch:
 
 /********************************************************************//**
 During merge, inserts to an index page a secondary index entry extracted
-from the insert buffer. */
+from the insert buffer.
+@return	newly inserted record */
 static
-void
+rec_t*
 ibuf_insert_to_index_page_low(
 /*==========================*/
+				/* out: newly inserted record */
 	const dtuple_t*	entry,	/*!< in: buffered entry to insert */
 	buf_block_t*	block,	/*!< in/out: index page where the buffered
 				entry should be placed */
@@ -3843,10 +3846,12 @@ ibuf_insert_to_index_page_low(
 	ulint		zip_size;
 	const page_t*	bitmap_page;
 	ulint		old_bits;
+	rec_t*		rec;
+	DBUG_ENTER("ibuf_insert_to_index_page_low");
 
-	if (UNIV_LIKELY
-	    (page_cur_tuple_insert(page_cur, entry, index, 0, mtr) != NULL)) {
-		return;
+	rec = page_cur_tuple_insert(page_cur, entry, index, 0, mtr);
+	if (rec != NULL) {
+		DBUG_RETURN(rec);
 	}
 
 	/* If the record did not fit, reorganize */
@@ -3856,9 +3861,9 @@ ibuf_insert_to_index_page_low(
 
 	/* This time the record must fit */
 
-	if (UNIV_LIKELY
-	    (page_cur_tuple_insert(page_cur, entry, index, 0, mtr) != NULL)) {
-		return;
+	rec = page_cur_tuple_insert(page_cur, entry, index, 0, mtr);
+	if (rec != NULL) {
+		DBUG_RETURN(rec);
 	}
 
 	page = buf_block_get_frame(block);
@@ -3911,6 +3916,7 @@ ibuf_insert_to_index_page(
 	ulint		low_match;
 	page_t*		page		= buf_block_get_frame(block);
 	rec_t*		rec;
+	DBUG_ENTER("ibuf_insert_to_index_page");
 
 	ut_ad(ibuf_inside(mtr));
 	ut_ad(dtuple_check_typed(entry));
@@ -3955,7 +3961,7 @@ dump:
 		      "InnoDB: Submit a detailed bug report to"
 		      " http://bugs.mysql.com!\n", stderr);
 
-		return;
+		DBUG_VOID_RETURN;
 	}
 
 	low_match = page_cur_search(block, index, entry,
@@ -3990,7 +3996,7 @@ dump:
 				rec, page_zip, FALSE, mtr);
 updated_in_place:
 			mem_heap_free(heap);
-			return;
+			DBUG_VOID_RETURN;
 		}
 
 		/* Copy the info bits. Clear the delete-mark. */
@@ -4034,15 +4040,21 @@ updated_in_place:
 		lock_rec_store_on_page_infimum(block, rec);
 		page_cur_delete_rec(&page_cur, index, offsets, mtr);
 		page_cur_move_to_prev(&page_cur);
+
+		rec = ibuf_insert_to_index_page_low(entry, block, index, mtr,
+						    &page_cur);
+		ut_ad(!cmp_dtuple_rec(entry, rec,
+				      rec_get_offsets(rec, index, NULL,
+						      ULINT_UNDEFINED,
+						      &heap)));
 		mem_heap_free(heap);
 
-		ibuf_insert_to_index_page_low(entry, block, index, mtr,
-					      &page_cur);
 		lock_rec_restore_from_page_infimum(block, rec, block);
 	} else {
 		ibuf_insert_to_index_page_low(entry, block, index, mtr,
 					      &page_cur);
 	}
+	DBUG_VOID_RETURN;
 }
 
 /****************************************************************//**