diff --git a/middleman-core/features/missing-tilt-lib.feature b/middleman-core/features/missing-tilt-lib.feature
new file mode 100644
index 00000000..95b7ba5a
--- /dev/null
+++ b/middleman-core/features/missing-tilt-lib.feature
@@ -0,0 +1,20 @@
+Feature: Tilt missing support libraries
+
+  Scenario: Rendering Textile and Wiki files
+    Given the Server is running at "missing-tilt-library-app"
+    When I go to "/danger-zone/more-wiki.html.wiki"
+    Then I should see "File Not Found"
+    When I go to "/danger-zone/more-wiki.html"
+    Then I should see "File Not Found"
+    When I go to "/safe-zone/my-wiki.html.wiki"
+    Then I should see "Safe"
+    When I go to "/safe-zone/my-wiki.html"
+    Then I should see "File Not Found"
+    When I go to "/textile-source.html.textile"
+    Then I should see "File Not Found"
+    When I go to "/textile-source.html"
+    Then I should see "File Not Found"
+    When I go to "/wiki-source.html.wiki"
+    Then I should see "Hola"
+    When I go to "/wiki-source.html"
+    Then I should see "File Not Found"
\ No newline at end of file
diff --git a/middleman-core/fixtures/missing-tilt-library-app/config.rb b/middleman-core/fixtures/missing-tilt-library-app/config.rb
new file mode 100644
index 00000000..4fcf66d7
--- /dev/null
+++ b/middleman-core/fixtures/missing-tilt-library-app/config.rb
@@ -0,0 +1,2 @@
+ignore "danger-zone/*"
+ignore "*.textile"
\ No newline at end of file
diff --git a/middleman-core/fixtures/missing-tilt-library-app/source/danger-zone/more-wiki.html.wiki b/middleman-core/fixtures/missing-tilt-library-app/source/danger-zone/more-wiki.html.wiki
new file mode 100644
index 00000000..32a18237
--- /dev/null
+++ b/middleman-core/fixtures/missing-tilt-library-app/source/danger-zone/more-wiki.html.wiki
@@ -0,0 +1 @@
+More
\ No newline at end of file
diff --git a/middleman-core/fixtures/missing-tilt-library-app/source/safe-zone/my-wiki.html.wiki b/middleman-core/fixtures/missing-tilt-library-app/source/safe-zone/my-wiki.html.wiki
new file mode 100644
index 00000000..dc30e052
--- /dev/null
+++ b/middleman-core/fixtures/missing-tilt-library-app/source/safe-zone/my-wiki.html.wiki
@@ -0,0 +1 @@
+Safe
\ No newline at end of file
diff --git a/middleman-core/fixtures/missing-tilt-library-app/source/textile-source.html.textile b/middleman-core/fixtures/missing-tilt-library-app/source/textile-source.html.textile
new file mode 100644
index 00000000..04e4284f
--- /dev/null
+++ b/middleman-core/fixtures/missing-tilt-library-app/source/textile-source.html.textile
@@ -0,0 +1 @@
+Textx
\ No newline at end of file
diff --git a/middleman-core/fixtures/missing-tilt-library-app/source/wiki-source.html.wiki b/middleman-core/fixtures/missing-tilt-library-app/source/wiki-source.html.wiki
new file mode 100644
index 00000000..af5a0623
--- /dev/null
+++ b/middleman-core/fixtures/missing-tilt-library-app/source/wiki-source.html.wiki
@@ -0,0 +1 @@
+Hola
\ No newline at end of file
diff --git a/middleman-core/lib/middleman-core/core_extensions/rendering.rb b/middleman-core/lib/middleman-core/core_extensions/rendering.rb
index d3d72216..4f1ade6c 100644
--- a/middleman-core/lib/middleman-core/core_extensions/rendering.rb
+++ b/middleman-core/lib/middleman-core/core_extensions/rendering.rb
@@ -75,6 +75,19 @@ module Middleman
             app.register Middleman::Renderers::Stylus
           rescue LoadError
           end
+
+          # Clean up missing Tilt exts
+          app.after_configuration do
+            Tilt.mappings.each do |key, klasses|
+              begin
+                Tilt[".#{key}"]
+              rescue LoadError
+                Tilt.mappings.delete(key)
+              rescue NameError
+                Tilt.mappings.delete(key)
+              end
+            end
+          end
         end
 
         alias :included :registered