diff --git a/MetadataProvider/AssemblyExtractor.cs b/MetadataProvider/AssemblyExtractor.cs
index 66787d90..9bb007be 100644
--- a/MetadataProvider/AssemblyExtractor.cs
+++ b/MetadataProvider/AssemblyExtractor.cs
@@ -626,6 +626,12 @@ private void ExtractParameters(IList<IVariable> parameters)
 			if (!currentMethod.IsStatic)
 			{
 				IType type = currentMethod.ContainingType;
+				
+				if (currentMethod.ContainingType.GenericParameters.Count > 0)
+				{
+					// within a generic method body, "this" is not the generic type itself but its instantiation
+					type = currentMethod.ContainingType.Instantiate(currentMethod.ContainingType.GenericParameters);
+				}
 
 				if (type.TypeKind == TypeKind.ValueType)
 				{