diff --git a/content/svg/content/src/nsSVGFilters.cpp b/content/svg/content/src/nsSVGFilters.cpp
index 648f261e44e..e42d1cbfcbf 100644
--- a/content/svg/content/src/nsSVGFilters.cpp
+++ b/content/svg/content/src/nsSVGFilters.cpp
@@ -3812,8 +3812,8 @@ nsSVGElement::NumberInfo nsSVGFEConvolveMatrixElement::sNumberInfo[4] =
 
 nsSVGElement::IntegerInfo nsSVGFEConvolveMatrixElement::sIntegerInfo[4] =
 {
-  { &nsGkAtoms::order, 0 },
-  { &nsGkAtoms::order, 0 },
+  { &nsGkAtoms::order, 3 },
+  { &nsGkAtoms::order, 3 },
   { &nsGkAtoms::targetX, 0 },
   { &nsGkAtoms::targetY, 0 }
 };
diff --git a/layout/reftests/svg/filters/feConvolveMatrix-order-01-ref.svg b/layout/reftests/svg/filters/feConvolveMatrix-order-01-ref.svg
new file mode 100644
index 00000000000..957c65e577b
--- /dev/null
+++ b/layout/reftests/svg/filters/feConvolveMatrix-order-01-ref.svg
@@ -0,0 +1,12 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+	<defs>
+		<filter id="convoluted_lime" x="0%" y="0%" width="100%" height="100%">
+			<feFlood flood-color="lime"/>
+			<feConvolveMatrix order="3" kernelMatrix="
+				0 0 0
+				0 1 0
+				0 0 0"/>
+		</filter>
+	</defs>
+	<rect x="30" y="30" width="97" height="60" filter="url(#convoluted_lime)"/>
+</svg>
diff --git a/layout/reftests/svg/filters/feConvolveMatrix-order-01.svg b/layout/reftests/svg/filters/feConvolveMatrix-order-01.svg
new file mode 100644
index 00000000000..6d0d116e777
--- /dev/null
+++ b/layout/reftests/svg/filters/feConvolveMatrix-order-01.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:html="http://www.w3.org/1999/xhtml">
+	<desc>
+		<html:p>When the 'order' attribute of feConvolveMatrix is
+		omitted the effect is the same as if the value "3" were given.
+		Per <html:a href="https://bugzilla.mozilla.org/show_bug.cgi?id=478570">Bug 478570</html:a>
+		discussion and linked spec errata.</html:p>
+	</desc>
+	<defs>
+		<filter id="convoluted_lime" x="0%" y="0%" width="100%" height="100%">
+			<feFlood flood-color="lime"/>
+			<feConvolveMatrix kernelMatrix="
+				0 0 0
+				0 1 0
+				0 0 0"/>
+		</filter>
+	</defs>
+	<rect x="30" y="30" width="97" height="60" fill="red" filter="url(#convoluted_lime)"/>
+</svg>
diff --git a/layout/reftests/svg/filters/reftest.list b/layout/reftests/svg/filters/reftest.list
index e20488f4dc6..a740913df0a 100644
--- a/layout/reftests/svg/filters/reftest.list
+++ b/layout/reftests/svg/filters/reftest.list
@@ -67,3 +67,4 @@ fails == filter-marked-line-01.svg pass.svg # bug 477704
 == filter-patterned-rect-01.svg pass.svg
 == filter-patterned-rect-02.svg pass.svg
 
+== feConvolveMatrix-order-01.svg feConvolveMatrix-order-01-ref.svg