diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/query/Criteria.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/query/Criteria.java
index df4dd6556..dd843e898 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/query/Criteria.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/query/Criteria.java
@@ -772,8 +772,17 @@ public class Criteria implements CriteriaDefinition {
 			return right == null;
 		}
 
-		if (left instanceof Pattern) {
-			return right instanceof Pattern ? ((Pattern) left).pattern().equals(((Pattern) right).pattern()) : false;
+		if (Pattern.class.isInstance(left)) {
+
+			if (!Pattern.class.isInstance(right)) {
+				return false;
+			}
+
+			Pattern leftPattern = (Pattern) left;
+			Pattern rightPattern = (Pattern) right;
+
+			return leftPattern.pattern().equals(rightPattern.pattern()) //
+					&& leftPattern.flags() == rightPattern.flags();
 		}
 
 		return ObjectUtils.nullSafeEquals(left, right);
diff --git a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/query/CriteriaTests.java b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/query/CriteriaTests.java
index 06bb9b2ff..e91837bb1 100644
--- a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/query/CriteriaTests.java
+++ b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/query/CriteriaTests.java
@@ -216,4 +216,13 @@ public class CriteriaTests {
 
 		assertThat(dbo, isBsonObject().containing("foo.$geoIntersects.$geometry", lineString));
 	}
+
+	@Test // DATAMONGO-2002
+	public void shouldEqualForSamePattern() {
+
+		Criteria left = new Criteria("field").regex("foo", "iu");
+		Criteria right = new Criteria("field").regex("foo");
+
+		assertThat(left, is(not(right)));
+	}
 }