diff --git a/src/support/FileName.cpp b/src/support/FileName.cpp
index 436501fe70..4418ab0884 100644
--- a/src/support/FileName.cpp
+++ b/src/support/FileName.cpp
@@ -255,6 +255,7 @@ unsigned long FileName::checksum() const
 		LYXERR0('\\' << absFilename() << "\" is a directory!");
 		return 0;
 	}
+	LYXERR0("Checksumming \"" << absFilename() << "\".");
 	return sum(absFilename().c_str());
 }
 
diff --git a/src/support/lyxsum.cpp b/src/support/lyxsum.cpp
index 1463927a68..161a964506 100644
--- a/src/support/lyxsum.cpp
+++ b/src/support/lyxsum.cpp
@@ -54,7 +54,7 @@ namespace support {
 
 unsigned long sum(char const * file)
 {
-	LYXERR(Debug::FILES, "lyx::sum() using mmap (lightning fast)");
+	//LYXERR(Debug::FILES, "lyx::sum() using mmap (lightning fast)");
 
 	int fd = open(file, O_RDONLY);
 	if (!fd)
@@ -116,7 +116,7 @@ using std::istreambuf_iterator;
 
 unsigned long sum(char const * file)
 {
-	LYXERR(Debug::FILES, "lyx::sum() using istreambuf_iterator (fast)");
+	//LYXERR(Debug::FILES, "lyx::sum() using istreambuf_iterator (fast)");
 
 	ifstream ifs(file, std::ios_base::in | std::ios_base::binary);
 	if (!ifs)
@@ -134,7 +134,7 @@ using std::ios;
 
 unsigned long sum(char const * file)
 {
-	LYXERR(Debug::FILES, "lyx::sum() using istream_iterator (slow as a snail)");
+	//LYXERR(Debug::FILES, "lyx::sum() using istream_iterator (slow as a snail)");
 
 	// a directory may be passed here so we need to test it. (bug 3622)
 	if (file.isDirectory())