diff --git a/tools/p2a.cpp b/tools/p2a.cpp
index b92887f..277fcbc 100644
--- a/tools/p2a.cpp
+++ b/tools/p2a.cpp
@@ -57,14 +57,14 @@
     {
         bridge = std::make_unique<NuvotonPciBridge>(pci, skipBridgeDisable);
     }
-    catch (NotFoundException& e)
+    catch (const NotFoundException& e)
     {}
 
     try
     {
         bridge = std::make_unique<AspeedPciBridge>(pci, skipBridgeDisable);
     }
-    catch (NotFoundException& e)
+    catch (const NotFoundException& e)
     {}
 
     if (!bridge)