diff --git a/src/log/builder.cr b/src/log/builder.cr
index a6ed72b08960..4aab82a94001 100644
--- a/src/log/builder.cr
+++ b/src/log/builder.cr
@@ -157,4 +157,10 @@ class Log::Builder
     end
     false
   end
+
+  # NOTE: workaround for https://github.com/crystal-lang/crystal/pull/14473
+  protected def cleanup_collected_log(log : Log) : Nil
+    ref = @logs.fetch(log.source) { return }
+    @logs.delete(log.source) if ref.value.nil? || ref.value == log
+  end
 end
diff --git a/src/log/log.cr b/src/log/log.cr
index c2f7f17771a7..3480cfecf33b 100644
--- a/src/log/log.cr
+++ b/src/log/log.cr
@@ -10,6 +10,11 @@ class Log
     @initial_level = level
   end
 
+  def finalize : Nil
+    # NOTE: workaround for https://github.com/crystal-lang/crystal/pull/14473
+    Log.builder.cleanup_collected_log(self)
+  end
+
   # :nodoc:
   def changed_level : Severity?
     @level