diff --git a/src/Main/SharpDevelop/Parser/AssemblyParserService.cs b/src/Main/SharpDevelop/Parser/AssemblyParserService.cs
index 0c864e2e7f..1b2959abb5 100644
--- a/src/Main/SharpDevelop/Parser/AssemblyParserService.cs
+++ b/src/Main/SharpDevelop/Parser/AssemblyParserService.cs
@@ -391,7 +391,7 @@ namespace ICSharpCode.SharpDevelop.Parser
 				return GetAssemblyModel(fileName, includeInternalMembers);
 			} catch (BadImageFormatException) {
 				SD.MessageService.ShowWarningFormatted("${res:ICSharpCode.SharpDevelop.Dom.AssemblyInvalid}", Path.GetFileName(fileName));
-			} catch (FileNotFoundException) {
+			} catch (IOException) {
 				SD.MessageService.ShowWarningFormatted("${res:ICSharpCode.SharpDevelop.Dom.AssemblyNotAccessible}", fileName);
 			}