diff --git a/engine/src/main/java/org/hibernate/search/spi/IndexedTypeMap.java b/engine/src/main/java/org/hibernate/search/spi/IndexedTypeMap.java
index b1924c7521a..b8c2921664f 100644
--- a/engine/src/main/java/org/hibernate/search/spi/IndexedTypeMap.java
+++ b/engine/src/main/java/org/hibernate/search/spi/IndexedTypeMap.java
@@ -18,7 +18,7 @@
  * In an ideal world, we will expose less methods than what is currently listed:
  * some methods have been introduced as Deprecated since the beginning as the plan
  * is to eventually remove them; they currently exist merely to allow a
- * pratical migration of code to the new approach in smaller, testable steps.
+ * practical migration of code to the new approach in smaller, testable steps.
  *
  * @author Sanne Grinovero
  */
diff --git a/engine/src/main/java/org/hibernate/search/spi/IndexedTypeSet.java b/engine/src/main/java/org/hibernate/search/spi/IndexedTypeSet.java
index 1c49bdd2ae4..6d7f4992cf4 100644
--- a/engine/src/main/java/org/hibernate/search/spi/IndexedTypeSet.java
+++ b/engine/src/main/java/org/hibernate/search/spi/IndexedTypeSet.java
@@ -8,6 +8,10 @@
 
 import java.util.Set;
 
+/**
+ * Represents a set of IndexedTypeIdentifier instances.
+ * Could be an empty set, a singleton set or actually multiple type identifiers.
+ */
 public interface IndexedTypeSet extends Iterable<IndexedTypeIdentifier> {
 
 	int size();
@@ -15,7 +19,7 @@ public interface IndexedTypeSet extends Iterable<IndexedTypeIdentifier> {
 	boolean isEmpty();
 
 	/**
-	 * Return the set of the unrelying POJOs.
+	 * Return the set of the underlying POJOs.
 	 * @deprecated This only exists to facilitate an iterative integration, and will be removed ASAP.
 	 */
 	@Deprecated