diff --git a/DOCS.md b/DOCS.md
index 8a31e2e..102f3ef 100644
--- a/DOCS.md
+++ b/DOCS.md
@@ -173,7 +173,7 @@ Emits when a color sensor is activated.
 ### "tilt" (port, x, y)
 Emits when a tilt sensor is activated.
 
-**Note**: If the event if fired from the Move Hub's inbuild tilt sensor, the special port "TILT" is used.
+**Note**: If the event is fired from the Move Hub's in-built tilt sensor, the special port "TILT" is used.
 
 **Kind**: event emitted by [<code>BoostHub</code>](#BoostHub)  
 
diff --git a/README.md b/README.md
index db7b3cc..05fcac3 100644
--- a/README.md
+++ b/README.md
@@ -213,7 +213,7 @@ Emits when a color sensor is activated.
 ### "tilt" (port, x, y)
 Emits when a tilt sensor is activated.
 
-**Note**: If the event if fired from the Move Hub's inbuild tilt sensor, the special port "TILT" is used.
+**Note**: If the event is fired from the Move Hub's in-built tilt sensor, the special port "TILT" is used.
 
 **Kind**: event emitted by [<code>BoostHub</code>](#BoostHub)  
 
diff --git a/boosthub.ts b/boosthub.ts
index 8a5c063..56d9071 100644
--- a/boosthub.ts
+++ b/boosthub.ts
@@ -322,7 +322,7 @@ export class BoostHub extends Hub {
                     /**
                      * Emits when a tilt sensor is activated.
                      *
-                     * **Note**: If the event if fired from the Move Hub's inbuild tilt sensor, the special port "TILT" is used.
+                     * **Note**: If the event is fired from the Move Hub's in-built tilt sensor, the special port "TILT" is used.
                      * @event BoostHub#tilt
                      * @param {string} port
                      * @param {number} x