diff --git a/docs/design/firmware-design.rst b/docs/design/firmware-design.rst
index 84bba18e6..65aa4a63c 100644
--- a/docs/design/firmware-design.rst
+++ b/docs/design/firmware-design.rst
@@ -1330,7 +1330,7 @@ element of the array specifies the interrupt number and its attributes
 (priority, group, configuration). Each element of the array shall be populated
 by the macro ``INTR_PROP_DESC()``. The macro takes the following arguments:
 
-- 10-bit interrupt number,
+- 13-bit interrupt number,
 
 - 8-bit interrupt priority,
 
diff --git a/include/common/interrupt_props.h b/include/common/interrupt_props.h
index 07bafaae5..681c89687 100644
--- a/include/common/interrupt_props.h
+++ b/include/common/interrupt_props.h
@@ -19,7 +19,7 @@
 	}
 
 typedef struct interrupt_prop {
-	unsigned int intr_num:10;
+	unsigned int intr_num:13;
 	unsigned int intr_pri:8;
 	unsigned int intr_grp:2;
 	unsigned int intr_cfg:2;