diff --git a/dom/base/nsImageLoadingContent.cpp b/dom/base/nsImageLoadingContent.cpp
index 7ddc2184b..1226ef22e 100644
--- a/dom/base/nsImageLoadingContent.cpp
+++ b/dom/base/nsImageLoadingContent.cpp
@@ -932,8 +932,12 @@ nsImageLoadingContent::LoadImage(nsIURI* aNewURI,
     MOZ_ASSERT(!req, "Shouldn't have non-null request here");
     // If we don't have a current URI, we might as well store this URI so people
     // know what we tried (and failed) to load.
-    if (!mCurrentRequest)
+    if (!mCurrentRequest) {
       mCurrentURI = aNewURI;
+      if (mImageBlockingStatus == nsIContentPolicy::ACCEPT) {
+        mImageBlockingStatus = nsIContentPolicy::REJECT_REQUEST;
+      }
+    }
 
     FireEvent(NS_LITERAL_STRING("error"));
     FireEvent(NS_LITERAL_STRING("loadend"));
diff --git a/layout/reftests/image/reftest.list b/layout/reftests/image/reftest.list
index 1a610811d..0eddb61fc 100644
--- a/layout/reftests/image/reftest.list
+++ b/layout/reftests/image/reftest.list
@@ -126,3 +126,5 @@ fuzzy(1,1) == image-orientation-background.html?90&flip      image-orientation-r
 
 == image-resize-percent-height.html image-resize-ref.html
 == image-resize-percent-width.html image-resize-ref.html
+
+== unknown-protocol.html unknown-protocol-ref.html
diff --git a/layout/reftests/image/unknown-protocol-ref.html b/layout/reftests/image/unknown-protocol-ref.html
new file mode 100644
index 000000000..b5bb326ee
--- /dev/null
+++ b/layout/reftests/image/unknown-protocol-ref.html
@@ -0,0 +1 @@
+<img src="mailto://foo">
diff --git a/layout/reftests/image/unknown-protocol.html b/layout/reftests/image/unknown-protocol.html
new file mode 100644
index 000000000..ef06881b7
--- /dev/null
+++ b/layout/reftests/image/unknown-protocol.html
@@ -0,0 +1 @@
+<img src="foobar://baz">