diff --git a/src/spellsuggest.c b/src/spellsuggest.c
index 5cb576f..6b34ec8 100644
--- a/src/spellsuggest.c
+++ b/src/spellsuggest.c
@@ -3228,7 +3228,7 @@
     hi = hash_lookup(&slang->sl_sounddone, goodword, hash);
     if (HASHITEM_EMPTY(hi))
     {
-	sft = alloc(sizeof(sftword_T) + STRLEN(goodword));
+	sft = alloc(offsetof(sftword_T, sft_word) + STRLEN(goodword) + 1);
 	if (sft != NULL)
 	{
 	    sft->sft_score = score;