diff --git a/src/main/java/com/adobe/epubcheck/opf/XRefChecker.java b/src/main/java/com/adobe/epubcheck/opf/XRefChecker.java
index 63aa1853e..ca5b614a5 100755
--- a/src/main/java/com/adobe/epubcheck/opf/XRefChecker.java
+++ b/src/main/java/com/adobe/epubcheck/opf/XRefChecker.java
@@ -326,7 +326,17 @@ private void checkReference(Reference ref)
&& !(version == EPUBVersion.VERSION_3 && res != null && res.item.isInSpine())
// audio, video, and fonts can be remote resources in EPUB 3
&& !(version == EPUBVersion.VERSION_3
- && EnumSet.of(Type.AUDIO, Type.VIDEO, Type.FONT).contains(ref.type)))
+ && (res != null
+ // if the item is declared, check its mime type
+ && (OPFChecker30.isAudioType(res.item.getMimeType())
+ || OPFChecker30.isVideoType(res.item.getMimeType())
+ || OPFChecker30.isFontType(res.item.getMimeType()))
+ // else, check if the reference is a type allowing remote resources
+ || ref.type == Type.FONT
+ || ref.type == Type.AUDIO
+ || ref.type == Type.VIDEO
+ )
+ ))
{
report.message(MessageId.RSC_006,
EPUBLocation.create(ref.source, ref.lineNumber, ref.columnNumber, ref.refResource));
diff --git a/src/test/resources/epub3/files/epub/resources-remote-audio-object-valid/EPUB/content_001.xhtml b/src/test/resources/epub3/files/epub/resources-remote-audio-object-valid/EPUB/content_001.xhtml
new file mode 100644
index 000000000..9a06ac276
--- /dev/null
+++ b/src/test/resources/epub3/files/epub/resources-remote-audio-object-valid/EPUB/content_001.xhtml
@@ -0,0 +1,11 @@
+
+
+
+
+ Minimal EPUB
+
+
+
+
+
+
diff --git a/src/test/resources/epub3/files/epub/resources-remote-audio-object-valid/EPUB/nav.xhtml b/src/test/resources/epub3/files/epub/resources-remote-audio-object-valid/EPUB/nav.xhtml
new file mode 100644
index 000000000..240745e63
--- /dev/null
+++ b/src/test/resources/epub3/files/epub/resources-remote-audio-object-valid/EPUB/nav.xhtml
@@ -0,0 +1,14 @@
+
+
+
+
+ Minimal Nav
+
+
+
+
+
diff --git a/src/test/resources/epub3/files/epub/resources-remote-audio-object-valid/EPUB/package.opf b/src/test/resources/epub3/files/epub/resources-remote-audio-object-valid/EPUB/package.opf
new file mode 100644
index 000000000..e8da45297
--- /dev/null
+++ b/src/test/resources/epub3/files/epub/resources-remote-audio-object-valid/EPUB/package.opf
@@ -0,0 +1,17 @@
+
+
+
+ Minimal EPUB 3.0
+ en
+ NOID
+ 2017-06-14T00:00:01Z
+
+
+