diff --git a/vercel/resource_project_domain.go b/vercel/resource_project_domain.go
index d5a7468d..d801c00f 100644
--- a/vercel/resource_project_domain.go
+++ b/vercel/resource_project_domain.go
@@ -148,7 +148,7 @@ func (r *projectDomainResource) Create(ctx context.Context, req resource.CreateR
 		return
 	}
 
-	_, err := r.client.GetProject(ctx, plan.ProjectID.ValueString(), plan.TeamID.ValueString())
+	project, err := r.client.GetProject(ctx, plan.ProjectID.ValueString(), plan.TeamID.ValueString())
 	if client.NotFound(err) {
 		resp.Diagnostics.AddError(
 			"Error creating project domain",
@@ -157,6 +157,19 @@ func (r *projectDomainResource) Create(ctx context.Context, req resource.CreateR
 		return
 	}
 
+	// Crazy condition to add an error if the git_branch is the production branch.
+	if plan.GitBranch.ValueString() != "" && project.Link != nil && project.Link.ProductionBranch != nil && *project.Link.ProductionBranch == plan.GitBranch.ValueString() {
+		resp.Diagnostics.AddError(
+			"Error adding domain to project",
+			fmt.Sprintf(
+				"Could not add domain %s to project %s, the git_branch specified is the production branch. If you want to use this domain as a production domain, please omit the git_branch field.",
+				plan.Domain.ValueString(),
+				plan.ProjectID.ValueString(),
+			),
+		)
+		return
+	}
+
 	out, err := r.client.CreateProjectDomain(ctx, plan.ProjectID.ValueString(), plan.TeamID.ValueString(), plan.toCreateRequest())
 	if err != nil {
 		resp.Diagnostics.AddError(
diff --git a/vercel/resource_project_domain_test.go b/vercel/resource_project_domain_test.go
index 826e353c..e2f9a490 100644
--- a/vercel/resource_project_domain_test.go
+++ b/vercel/resource_project_domain_test.go
@@ -3,6 +3,8 @@ package vercel_test
 import (
 	"context"
 	"fmt"
+	"regexp"
+	"strings"
 	"testing"
 
 	"github.com/hashicorp/terraform-plugin-testing/helper/acctest"
@@ -26,6 +28,13 @@ func TestAcc_ProjectDomain(t *testing.T) {
 		ProtoV6ProviderFactories: testAccProtoV6ProviderFactories,
 		CheckDestroy:             noopDestroyCheck,
 		Steps: []resource.TestStep{
+			// Check error adding production domain
+			{
+				Config: testAccProjectDomainWithProductionGitBranch(projectSuffix, domain, teamIDConfig()),
+				ExpectError: regexp.MustCompile(
+					strings.ReplaceAll("the git_branch specified is the production branch. If you want to use this domain as a production domain, please omit the git_branch field.", " ", `\s*`),
+				),
+			},
 			// Create and Read testing
 			{
 				Config: testAccProjectDomainConfig(projectSuffix, domain, teamIDConfig()),
@@ -98,6 +107,26 @@ func testAccProjectDomainDestroy(n, teamID, domain string) resource.TestCheckFun
 	}
 }
 
+func testAccProjectDomainWithProductionGitBranch(projectSuffix, domain, teamIDConfig string) string {
+	return fmt.Sprintf(`
+resource "vercel_project" "test" {
+  name = "test-acc-domain-%[1]s"
+  %[2]s
+  git_repository = {
+    type = "github"
+    repo = "%[4]s"
+  }
+}
+
+resource "vercel_project_domain" "test" {
+  domain = "%[3]s"
+  %[2]s
+  git_branch = "main"
+  project_id = vercel_project.test.id
+}
+`, projectSuffix, teamIDConfig, domain, testGithubRepo())
+}
+
 func testAccProjectDomainConfig(projectSuffix, domain, extra string) string {
 	return fmt.Sprintf(`
 resource "vercel_project" "test" {