diff --git a/ILSpy/Analyzers/Builtin/MemberImplementsInterfaceAnalyzer.cs b/ILSpy/Analyzers/Builtin/MemberImplementsInterfaceAnalyzer.cs
index b1e1e8aefd..d4c87ced58 100644
--- a/ILSpy/Analyzers/Builtin/MemberImplementsInterfaceAnalyzer.cs
+++ b/ILSpy/Analyzers/Builtin/MemberImplementsInterfaceAnalyzer.cs
@@ -51,7 +51,7 @@ public bool Show(ISymbol symbol)
 				case SymbolKind.Property:
 					var member = (IMember)symbol;
 					var type = member.DeclaringTypeDefinition;
-					return !member.IsStatic && (type.Kind == TypeKind.Class || type.Kind == TypeKind.Struct);
+					return !member.IsStatic && type is not null && (type.Kind == TypeKind.Class || type.Kind == TypeKind.Struct);
 
 				default:
 					return false;