diff --git a/Documentation/devicetree/bindings/powerpc/fsl/mpic.txt b/Documentation/devicetree/bindings/powerpc/fsl/mpic.txt
index 2cf38bd841fd5776028803a11882036dccb3e38c..ebafba29fc5f84799f1c88adcd23b8221024255b 100644
--- a/Documentation/devicetree/bindings/powerpc/fsl/mpic.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/mpic.txt
@@ -56,7 +56,14 @@ PROPERTIES
           to the client.  The presence of this property also mandates
           that any initialization related to interrupt sources shall
           be limited to sources explicitly referenced in the device tree.
-       
+
+  - big-endian
+      Usage: optional
+      Value type: <empty>
+          If present the MPIC will be assumed to be big-endian.  Some
+          device-trees omit this property on MPIC nodes even when the MPIC is
+          in fact big-endian, so certain boards override this property.
+
 INTERRUPT SPECIFIER DEFINITION
 
   Interrupt specifiers consists of 4 cells encoded as
diff --git a/arch/powerpc/boot/dts/fsl/pq3-mpic.dtsi b/arch/powerpc/boot/dts/fsl/pq3-mpic.dtsi
index 5c8046065844419f17b067b42007ee6c63c6d161..47f2b676bc7d1b65d03237cbfe1a6639a0481312 100644
--- a/arch/powerpc/boot/dts/fsl/pq3-mpic.dtsi
+++ b/arch/powerpc/boot/dts/fsl/pq3-mpic.dtsi
@@ -39,6 +39,7 @@ mpic: pic@40000 {
 	reg = <0x40000 0x40000>;
 	compatible = "fsl,mpic";
 	device_type = "open-pic";
+	big-endian;
 };
 
 timer@41100 {