diff --git a/include/dt-bindings/mailbox/qcom-ipcc.h b/include/dt-bindings/mailbox/qcom-ipcc.h
index 9296d0bb5f34..fbfa3febc66d 100644
--- a/include/dt-bindings/mailbox/qcom-ipcc.h
+++ b/include/dt-bindings/mailbox/qcom-ipcc.h
@@ -30,6 +30,7 @@
 #define IPCC_CLIENT_PCIE1		14
 #define IPCC_CLIENT_PCIE2		15
 #define IPCC_CLIENT_SPSS		16
+#define IPCC_CLIENT_NSP1		18
 #define IPCC_CLIENT_TME			23
 #define IPCC_CLIENT_WPSS		24