diff --git a/core/include/irq.h b/core/include/irq.h
index 29a969a02389c3603bfab0052f9cd60c451521fe..9ed47876d5ae5236154bc460d437eb6f6610fbab 100644
--- a/core/include/irq.h
+++ b/core/include/irq.h
@@ -30,7 +30,7 @@
 /**
  * @brief   This function sets the IRQ disable bit in the status register
  *
- * @return  Previous value of status register. The return value should not
+ * @return  Previous value of status register. The return value should not be
  *          interpreted as a boolean value. The actual value is only
  *          significant for irq_restore().
  *
@@ -41,7 +41,7 @@ unsigned irq_disable(void);
 /**
  * @brief   This function clears the IRQ disable bit in the status register
  *
- * @return  Previous value of status register. The return value should not
+ * @return  Previous value of status register. The return value should not be
  *          interpreted as a boolean value. The actual value is only
  *          significant for irq_restore().
  *