diff --git a/project/core/sourcecontrol/Mercurial/Mercurial.cs b/project/core/sourcecontrol/Mercurial/Mercurial.cs
index 95f15a11a..98fcc5337 100644
--- a/project/core/sourcecontrol/Mercurial/Mercurial.cs
+++ b/project/core/sourcecontrol/Mercurial/Mercurial.cs
@@ -530,6 +530,14 @@ private ProcessResult HgHeads(IIntegrationResult result)
 		{
 			ProcessArgumentBuilder buffer = new ProcessArgumentBuilder();
 			buffer.AddArgument("heads");
+			if(string.IsNullOrEmpty(Branch))
+			{
+				buffer.AddArgument(".");
+			}
+			else
+			{
+				buffer.AddArgument(Branch);
+			}
 			buffer.AddArgument("--template", "{rev}:");
 
 			var bpi = GetBuildProgressInformation(result);