diff --git a/src/Umbraco.Core/TypeFinder.cs b/src/Umbraco.Core/TypeFinder.cs
index 48c3a4deeb..e25b092e11 100644
--- a/src/Umbraco.Core/TypeFinder.cs
+++ b/src/Umbraco.Core/TypeFinder.cs
@@ -407,6 +407,10 @@ namespace Umbraco.Core
 
 		private static IEnumerable<Type> GetTypesWithFormattedException(Assembly a)
 		{
+			//if the assembly is dynamic, do not try to scan it
+			if (a.IsDynamic)
+				return Enumerable.Empty<Type>();
+
 			try
 			{
 				return a.GetExportedTypes();