diff --git a/bindings/pci/pci-msm.txt b/bindings/pci/pci-msm.txt
index c66bedf20c43..22f05045e34c 100644
--- a/bindings/pci/pci-msm.txt
+++ b/bindings/pci/pci-msm.txt
@@ -24,6 +24,7 @@ Main node
 		- "elbi"	External local bus interface registers
 		- "iatu"	Internal translation unit registers
 		- "config"	PCIe device configuration space
+		- "mhi" (opt)	PCIe MHI registers
 		- "tcsr" (opt)	PCIe clock scheme register
 		- "rumi" (opt)	PCIe RUMI register