diff --git a/mcs/class/corlib/System.IO/Path.cs b/mcs/class/corlib/System.IO/Path.cs
index 59cadf1c13ca..6d3b66e893e1 100644
--- a/mcs/class/corlib/System.IO/Path.cs
+++ b/mcs/class/corlib/System.IO/Path.cs
@@ -355,7 +355,11 @@ internal static string InsecureGetFullPath (string path)
 					}
 					canonicalize = start > 0;
 					
-					path = Directory.GetCurrentDirectory () + DirectorySeparatorStr + path;
+					var cwd = Directory.GetCurrentDirectory();
+					if (cwd.EndsWith(DirectorySeparatorStr))
+						path = cwd + path;
+					else
+						path = cwd + DirectorySeparatorChar + path;
 				} else if (DirectorySeparatorChar == '\\' &&
 					path.Length >= 2 &&
 					IsDsc (path [0]) &&