diff --git a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/GroupToGroupDtoMapper.java b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/GroupToGroupDtoMapper.java
index aa417561aa..f98ce7e66f 100644
--- a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/GroupToGroupDtoMapper.java
+++ b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/GroupToGroupDtoMapper.java
@@ -16,18 +16,15 @@ import static de.otto.edison.hal.Links.linkingTo;
 import static sonia.scm.api.v2.resources.ResourceLinks.group;
 import static sonia.scm.api.v2.resources.ResourceLinks.user;
 
+/**
+ * Mapstruct does not support parameterized (i.e. non-default) constructors. Thus, we need to use field injection.
+ */
+@java.lang.SuppressWarnings("squid:S3306")
 @Mapper
 public abstract class GroupToGroupDtoMapper extends BaseMapper<Group, GroupDto> {
 
-  private UriInfoStore uriInfoStore;
-
-  GroupToGroupDtoMapper() {
-  }
-
   @Inject
-  public GroupToGroupDtoMapper(UriInfoStore uriInfoStore) {
-    this.uriInfoStore = uriInfoStore;
-  }
+  private UriInfoStore uriInfoStore;
 
   @AfterMapping
   void appendLinks(Group group, @MappingTarget GroupDto target) {
diff --git a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserCollectionToDtoMapper.java b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserCollectionToDtoMapper.java
index 015ba04ae9..b609771e69 100644
--- a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserCollectionToDtoMapper.java
+++ b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserCollectionToDtoMapper.java
@@ -7,6 +7,10 @@ import javax.inject.Inject;
 
 import static sonia.scm.api.v2.resources.ResourceLinks.userCollection;
 
+/**
+ * Mapstruct does not support parameterized (i.e. non-default) constructors. Thus, we need to use field injection.
+ */
+@java.lang.SuppressWarnings("squid:S3306")
 public class UserCollectionToDtoMapper extends BasicCollectionToDtoMapper<User, UserDto> {
 
   private final UriInfoStore uriInfoStore;
diff --git a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserDtoToUserMapper.java b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserDtoToUserMapper.java
index 313fa0ce8b..f06e9803a4 100644
--- a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserDtoToUserMapper.java
+++ b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserDtoToUserMapper.java
@@ -8,18 +8,15 @@ import javax.inject.Inject;
 
 import static sonia.scm.api.rest.resources.UserResource.DUMMY_PASSWORT;
 
+/**
+ * Mapstruct does not support parameterized (i.e. non-default) constructors. Thus, we need to use field injection.
+ */
+@java.lang.SuppressWarnings("squid:S3306")
 @Mapper
 public abstract class UserDtoToUserMapper {
 
-  private PasswordService passwordService;
-
-  UserDtoToUserMapper() {
-  }
-
   @Inject
-  public UserDtoToUserMapper(PasswordService passwordService) {
-    this.passwordService = passwordService;
-  }
+  private PasswordService passwordService;
 
   @Mappings({
     @Mapping(source = "password", target = "password", qualifiedByName = "encrypt"),
diff --git a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserToUserDtoMapper.java b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserToUserDtoMapper.java
index 80d747ece0..3c9a03d9bb 100644
--- a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserToUserDtoMapper.java
+++ b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/UserToUserDtoMapper.java
@@ -14,6 +14,10 @@ import static de.otto.edison.hal.Link.link;
 import static de.otto.edison.hal.Links.linkingTo;
 import static sonia.scm.api.v2.resources.ResourceLinks.user;
 
+/**
+ * Mapstruct does not support parameterized (i.e. non-default) constructors. Thus, we need to use field injection.
+ */
+@java.lang.SuppressWarnings("squid:S3306")
 @Mapper
 public abstract class UserToUserDtoMapper extends BaseMapper<User, UserDto> {