diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index ae13a8a691..f5df5b6aa4 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -27,6 +27,8 @@ In addition to the following notable bug fixes, you can browse the [full list of
 * **Bug fixes:**
   * The regression in the [`fogejo admin user create`](https://forgejo.org/docs/v7.0/admin/command-line/#admin-user-create) CLI command [is fixed](https://codeberg.org/forgejo/forgejo/issues/3399) and it is backward compatible.
 
+- Fixed a bug where the `/api/v1/repos/{owner}/{repo}/wiki` API endpoints were using a hardcoded "master" branch for the wiki, rather than the branch they really use. ([#3430](https://codeberg.org/forgejo/forgejo/pulls/3430))
+
 ## 7.0.0
 
 The [complete list of commits](https://codeberg.org/forgejo/forgejo/commits/branch/v7.0/forgejo) included in the `Forgejo v7.0.0` release can be reviewed from the command line with:
diff --git a/routers/api/v1/repo/wiki.go b/routers/api/v1/repo/wiki.go
index f18ea087c4..b6f51cdadc 100644
--- a/routers/api/v1/repo/wiki.go
+++ b/routers/api/v1/repo/wiki.go
@@ -193,7 +193,7 @@ func getWikiPage(ctx *context.APIContext, wikiName wiki_service.WebPath) *api.Wi
 	}
 
 	// get commit count - wiki revisions
-	commitsCount, _ := wikiRepo.FileCommitsCount("master", pageFilename)
+	commitsCount, _ := wikiRepo.FileCommitsCount(ctx.Repo.Repository.GetWikiBranchName(), pageFilename)
 
 	// Get last change information.
 	lastCommit, err := wikiRepo.GetCommitByPath(pageFilename)
@@ -432,7 +432,7 @@ func ListPageRevisions(ctx *context.APIContext) {
 	}
 
 	// get commit count - wiki revisions
-	commitsCount, _ := wikiRepo.FileCommitsCount("master", pageFilename)
+	commitsCount, _ := wikiRepo.FileCommitsCount(ctx.Repo.Repository.GetWikiBranchName(), pageFilename)
 
 	page := ctx.FormInt("page")
 	if page <= 1 {
@@ -442,7 +442,7 @@ func ListPageRevisions(ctx *context.APIContext) {
 	// get Commit Count
 	commitsHistory, err := wikiRepo.CommitsByFileAndRange(
 		git.CommitsByFileAndRangeOptions{
-			Revision: "master",
+			Revision: ctx.Repo.Repository.GetWikiBranchName(),
 			File:     pageFilename,
 			Page:     page,
 		})
@@ -487,7 +487,7 @@ func findWikiRepoCommit(ctx *context.APIContext) (*git.Repository, *git.Commit)
 		return nil, nil
 	}
 
-	commit, err := wikiRepo.GetBranchCommit("master")
+	commit, err := wikiRepo.GetBranchCommit(ctx.Repo.Repository.GetWikiBranchName())
 	if err != nil {
 		if git.IsErrNotExist(err) {
 			ctx.NotFound(err)
diff --git a/tests/integration/api_wiki_test.go b/tests/integration/api_wiki_test.go
index 2b71616112..400cf068b4 100644
--- a/tests/integration/api_wiki_test.go
+++ b/tests/integration/api_wiki_test.go
@@ -16,6 +16,7 @@ import (
 	unit_model "code.gitea.io/gitea/models/unit"
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/optional"
 	api "code.gitea.io/gitea/modules/structs"
 	repo_service "code.gitea.io/gitea/services/repository"
 	"code.gitea.io/gitea/tests"
@@ -382,3 +383,28 @@ func TestAPIListPageRevisions(t *testing.T) {
 
 	assert.Equal(t, dummyrevisions, revisions)
 }
+
+func TestAPIWikiNonMasterBranch(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
+	repo, _, f := CreateDeclarativeRepoWithOptions(t, user, DeclarativeRepoOptions{
+		WikiBranch: optional.Some("main"),
+	})
+	defer f()
+
+	uris := []string{
+		"revisions/Home",
+		"pages",
+		"page/Home",
+	}
+	baseURL := fmt.Sprintf("/api/v1/repos/%s/wiki", repo.FullName())
+	for _, uri := range uris {
+		t.Run(uri, func(t *testing.T) {
+			defer tests.PrintCurrentTest(t)()
+
+			req := NewRequestf(t, "GET", "%s/%s", baseURL, uri)
+			MakeRequest(t, req, http.StatusOK)
+		})
+	}
+}
diff --git a/tests/integration/integration_test.go b/tests/integration/integration_test.go
index 7a373c74ee..61a243e52f 100644
--- a/tests/integration/integration_test.go
+++ b/tests/integration/integration_test.go
@@ -46,6 +46,7 @@ import (
 	repo_service "code.gitea.io/gitea/services/repository"
 	files_service "code.gitea.io/gitea/services/repository/files"
 	user_service "code.gitea.io/gitea/services/user"
+	wiki_service "code.gitea.io/gitea/services/wiki"
 	"code.gitea.io/gitea/tests"
 
 	"github.com/PuerkitoBio/goquery"
@@ -658,6 +659,7 @@ type DeclarativeRepoOptions struct {
 	EnabledUnits  optional.Option[[]unit_model.Type]
 	DisabledUnits optional.Option[[]unit_model.Type]
 	Files         optional.Option[[]*files_service.ChangeRepoFile]
+	WikiBranch    optional.Option[string]
 }
 
 func CreateDeclarativeRepoWithOptions(t *testing.T, owner *user_model.User, opts DeclarativeRepoOptions) (*repo_model.Repository, string, func()) {
@@ -734,6 +736,22 @@ func CreateDeclarativeRepoWithOptions(t *testing.T, owner *user_model.User, opts
 		sha = resp.Commit.SHA
 	}
 
+	// If there's a Wiki branch specified, create a wiki, and a default wiki page.
+	if opts.WikiBranch.Has() {
+		// Set the wiki branch in the database first
+		repo.WikiBranch = opts.WikiBranch.Value()
+		err := repo_model.UpdateRepositoryCols(db.DefaultContext, repo, "wiki_branch")
+		assert.NoError(t, err)
+
+		// Initialize the wiki
+		err = wiki_service.InitWiki(db.DefaultContext, repo)
+		assert.NoError(t, err)
+
+		// Add a new wiki page
+		err = wiki_service.AddWikiPage(db.DefaultContext, owner, repo, "Home", "Welcome to the wiki!", "Add a Home page")
+		assert.NoError(t, err)
+	}
+
 	// Return the repo, the top commit, and a defer-able function to delete the
 	// repo.
 	return repo, sha, func() {