From 4c25279f918ae36ba71ef3eca750c782a42be485 Mon Sep 17 00:00:00 2001
From: Marcel Ploemacher <marcel.ploemacher@smail.th-koeln.de>
Date: Wed, 25 Mar 2026 13:13:59 +0100
Subject: [PATCH] Added check for file ending

---
 .../OssCadSuiteIntegrationModule.cs                          | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/OneWare.OssCadSuiteIntegration/OssCadSuiteIntegrationModule.cs b/src/OneWare.OssCadSuiteIntegration/OssCadSuiteIntegrationModule.cs
index 3e4bb5433..2a7b7fccc 100644
--- a/src/OneWare.OssCadSuiteIntegration/OssCadSuiteIntegrationModule.cs
+++ b/src/OneWare.OssCadSuiteIntegration/OssCadSuiteIntegrationModule.cs
@@ -609,8 +609,9 @@ await serviceProvider.Resolve<GtkWaveService>().OpenInGtkWaveAsync(wave.FullPath
         fpgaService.RegisterProjectEntryModification(x =>
         {
             if (x.Root is not UniversalFpgaProjectRoot universalFpgaProjectRoot) return;
-            
-            if (x is IProjectFile file && YosysSettingHelper.GetConstraintFile(universalFpgaProjectRoot) == file.RelativePath)
+            if (!(x is IProjectFile file && file.Extension == ".pcf")) return;
+
+            if (YosysSettingHelper.GetConstraintFile(universalFpgaProjectRoot) == file.RelativePath)
             {
                 x.Icon?.AddOverlay("ConstraintFile", "ForkAwesome.Check");
             }