diff --git a/src/xrt/compositor/util/comp_base.h b/src/xrt/compositor/util/comp_base.h
index 2cea42c49..010c346b0 100644
--- a/src/xrt/compositor/util/comp_base.h
+++ b/src/xrt/compositor/util/comp_base.h
@@ -94,7 +94,7 @@ struct comp_base
  */
 
 /*!
- * Convenience function to convert a xrt_compositor to a comp_base.
+ * Convenience function to convert an xrt_compositor to a comp_base.
  *
  * @private @memberof comp_base
  */
diff --git a/src/xrt/compositor/util/comp_semaphore.h b/src/xrt/compositor/util/comp_semaphore.h
index 0baa7c591..3864a6ce3 100644
--- a/src/xrt/compositor/util/comp_semaphore.h
+++ b/src/xrt/compositor/util/comp_semaphore.h
@@ -50,7 +50,7 @@ struct comp_semaphore
  */
 
 /*!
- * Convenience function to convert a xrt_compositor_semaphore to a comp_semaphore.
+ * Convenience function to convert an xrt_compositor_semaphore to a comp_semaphore.
  *
  * @ingroup comp_util
  * @private @memberof comp_semaphore
diff --git a/src/xrt/compositor/util/comp_swapchain.h b/src/xrt/compositor/util/comp_swapchain.h
index 741a7d6c2..b452392c1 100644
--- a/src/xrt/compositor/util/comp_swapchain.h
+++ b/src/xrt/compositor/util/comp_swapchain.h
@@ -116,7 +116,7 @@ struct comp_swapchain
  */
 
 /*!
- * Convenience function to convert a xrt_swapchain to a comp_swapchain.
+ * Convenience function to convert an xrt_swapchain to a comp_swapchain.
  *
  * @ingroup comp_util
  * @private @memberof comp_swapchain