diff --git a/src/AutoMapper/Configuration/MapperConfigurationExpression.cs b/src/AutoMapper/Configuration/MapperConfigurationExpression.cs
index 74bd5dfa84..f6553be0be 100644
--- a/src/AutoMapper/Configuration/MapperConfigurationExpression.cs
+++ b/src/AutoMapper/Configuration/MapperConfigurationExpression.cs
@@ -58,7 +58,7 @@ public void AddProfiles(params Type[] typesFromAssembliesContainingProfiles)
 
         private void AddProfilesCore(IEnumerable<Assembly> assembliesToScan)
         {
-            var allTypes = assembliesToScan.SelectMany(a => a.ExportedTypes).ToArray();
+            var allTypes = assembliesToScan.Where(a => !a.IsDynamic).SelectMany(a => a.ExportedTypes).ToArray();
 
             var profiles =
                 allTypes