diff --git a/de4dot.code/renamer/Renamer.cs b/de4dot.code/renamer/Renamer.cs
index d5bd9634..915efe59 100644
--- a/de4dot.code/renamer/Renamer.cs
+++ b/de4dot.code/renamer/Renamer.cs
@@ -1232,6 +1232,8 @@ namespace de4dot.code.renamer {
 				}
 			}
 			var overrideMethod = method.MethodDef.Overrides[0].MethodDeclaration;
+			if (overrideMethod.DeclaringType == null)
+				return "";
 			var name = overrideMethod.DeclaringType.FullName.Replace('/', '.');
 			name = removeGenericsArityRegex.Replace(name, "");
 			return name + ".";