diff --git a/lib/pry/history.rb b/lib/pry/history.rb
index 494a6b70..1fff3b0b 100644
--- a/lib/pry/history.rb
+++ b/lib/pry/history.rb
@@ -57,6 +57,7 @@ class Pry
     # history file.
     def clear
       @clearer.call
+      @original_lines = 0
       @history = []
     end
 
diff --git a/spec/history_spec.rb b/spec/history_spec.rb
index f682c47e..4c0cc2fd 100644
--- a/spec/history_spec.rb
+++ b/spec/history_spec.rb
@@ -53,6 +53,7 @@ describe Pry do
       Pry.history.to_a.size.should be > 0
       Pry.history.clear
       Pry.history.to_a.size.should eq 0
+      Pry.history.original_lines.should eq 0
     end
 
     it "doesn't affect the contents of the history file" do