diff --git a/shared/processor.h b/shared/processor.h
index 82f1c27..4e7d26f 100644
--- a/shared/processor.h
+++ b/shared/processor.h
@@ -11,6 +11,7 @@ enum DataSource
 };
 
 #define NOTHING_PROCESSED 4
+#define NO_ACCESS 5
 
 class Processor
 {
diff --git a/shared/sandboxedprocessor.cpp b/shared/sandboxedprocessor.cpp
index 011df6f..003fd92 100644
--- a/shared/sandboxedprocessor.cpp
+++ b/shared/sandboxedprocessor.cpp
@@ -92,6 +92,10 @@ int SandboxedProcessor::process()
 			processor = defaultTextProcessor;
 		}
 	}
+	if(!fileInfo.isReadable())
+	{
+		return NO_ACCESS;
+	}
 	if(processor == nullptr || processor == nothingProcessor)
 	{
 		/* Nothing to do */