diff --git a/src/GitVersionCore.Tests/IntegrationTests/OtherScenarios.cs b/src/GitVersionCore.Tests/IntegrationTests/OtherScenarios.cs
index 4ebda3317b..5fef1447c6 100644
--- a/src/GitVersionCore.Tests/IntegrationTests/OtherScenarios.cs
+++ b/src/GitVersionCore.Tests/IntegrationTests/OtherScenarios.cs
@@ -46,6 +46,20 @@ public void AllowNotHavingMaster()
             }
         }
 
+        [Test]
+        public void AllowHavingVariantsStartingWithMaster()
+        {
+            using (var fixture = new EmptyRepositoryFixture())
+            {
+                fixture.Repository.MakeACommit();
+                fixture.Repository.MakeATaggedCommit("1.0.0");
+                fixture.Repository.MakeACommit();
+                Commands.Checkout(fixture.Repository, fixture.Repository.CreateBranch("masterfix"));
+
+                fixture.AssertFullSemver("1.0.1-masterfix.1+1");
+            }
+        }
+
         [Test]
         public void AllowHavingMainInsteadOfMaster()
         {
diff --git a/src/GitVersionCore/Configuration/Config.cs b/src/GitVersionCore/Configuration/Config.cs
index a5d6dcecf8..4b822327e9 100644
--- a/src/GitVersionCore/Configuration/Config.cs
+++ b/src/GitVersionCore/Configuration/Config.cs
@@ -95,7 +95,7 @@ public BranchConfig GetConfigForBranch(string branchName)
         {
             if (branchName == null) throw new ArgumentNullException(nameof(branchName));
             var matches = Branches
-                .Where(b => Regex.IsMatch(branchName, "^" + b.Value.Regex, RegexOptions.IgnoreCase));
+                .Where(b => Regex.IsMatch(branchName, "^" + b.Value.Regex + "$", RegexOptions.IgnoreCase));
 
             try
             {