diff --git a/lib/bundler/source/path.rb b/lib/bundler/source/path.rb
index 6a99f8e977ec67..d4c530e922b0d6 100644
--- a/lib/bundler/source/path.rb
+++ b/lib/bundler/source/path.rb
@@ -53,6 +53,8 @@ def to_s
         "source at `#{@path}`"
       end
 
+      alias_method :to_gemfile, :path
+
       def hash
         [self.class, expanded_path, version].hash
       end
diff --git a/spec/bundler/install/deploy_spec.rb b/spec/bundler/install/deploy_spec.rb
index 4b2b0325c8f2e4..bd39ac5cc1d4ae 100644
--- a/spec/bundler/install/deploy_spec.rb
+++ b/spec/bundler/install/deploy_spec.rb
@@ -483,6 +483,27 @@
       expect(err).not_to include("You have deleted from the Gemfile")
     end
 
+    it "explodes if you change a source from path to git" do
+      build_git "myrack", path: lib_path("myrack")
+
+      install_gemfile <<-G
+        source "https://gem.repo1"
+        gem "myrack", :path => "#{lib_path("myrack")}"
+      G
+
+      gemfile <<-G
+        source "https://gem.repo1"
+        gem "myrack", :git => "https:/my-git-repo-for-myrack"
+      G
+
+      bundle "config set --local frozen true"
+      bundle :install, raise_on_error: false
+      expect(err).to include("frozen mode")
+      expect(err).to include("You have changed in the Gemfile:\n* myrack from `#{lib_path("myrack")}` to `https:/my-git-repo-for-myrack`")
+      expect(err).not_to include("You have added to the Gemfile")
+      expect(err).not_to include("You have deleted from the Gemfile")
+    end
+
     it "remembers that the bundle is frozen at runtime" do
       bundle :lock