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-rw-r--r--lib/pure/collections/tables.nim1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/pure/collections/tables.nim b/lib/pure/collections/tables.nim
index fe75f9a58..dd178ed4e 100644
--- a/lib/pure/collections/tables.nim
+++ b/lib/pure/collections/tables.nim
@@ -949,6 +949,7 @@ proc inc*[A](t: var CountTable[A], key: A, val = 1) =
   var index = rawGet(t, key)
   if index >= 0:
     inc(t.data[index].val, val)
+    if t.data[index].val == 0: dec(t.counter)
   else:
     if mustRehash(len(t.data), t.counter): enlarge(t)
     rawInsert(t, t.data, key, val)