diff --git a/src/libraries/System.Configuration.ConfigurationManager/src/System/Configuration/ClientConfigPaths.cs b/src/libraries/System.Configuration.ConfigurationManager/src/System/Configuration/ClientConfigPaths.cs
index d69806d970dbd..a2a818b7a5150 100644
--- a/src/libraries/System.Configuration.ConfigurationManager/src/System/Configuration/ClientConfigPaths.cs
+++ b/src/libraries/System.Configuration.ConfigurationManager/src/System/Configuration/ClientConfigPaths.cs
@@ -248,7 +248,6 @@ private static string GetTypeAndHashSuffix(string exePath, bool isSingleFile)
             if (assembly != null && !isSingleFile)
             {
                 AssemblyName assemblyName = assembly.GetName();
-                Uri codeBase = new Uri(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, assembly.ManifestModule.Name));
 
                 try
                 {
@@ -261,7 +260,7 @@ private static string GetTypeAndHashSuffix(string exePath, bool isSingleFile)
                 {
                     typeName = StrongNameDesc;
                 }
-                else
+                else if (Uri.TryCreate(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, assembly.ManifestModule.Name), UriKind.Absolute, out Uri codeBase))
                 {
                     try
                     {