diff --git a/desktop-widgets/mainwindow.cpp b/desktop-widgets/mainwindow.cpp
index ca36cb75c..a3d6c4333 100644
--- a/desktop-widgets/mainwindow.cpp
+++ b/desktop-widgets/mainwindow.cpp
@@ -592,7 +592,7 @@ void learnImageDirs(QStringList dirnames)
 {
 	QList<QFuture<void> > futures;
 	foreach (QString dir, dirnames) {
-		futures << QtConcurrent::run(learnImages, QDir(dir), 10, false);
+		futures << QtConcurrent::run(learnImages, QDir(dir), 10);
 	}
 	DivePictureModel::instance()->updateDivePicturesWhenDone(futures);
 }
diff --git a/subsurface-core/qthelper.cpp b/subsurface-core/qthelper.cpp
index 72221eacf..7c67e0993 100644
--- a/subsurface-core/qthelper.cpp
+++ b/subsurface-core/qthelper.cpp
@@ -1129,14 +1129,13 @@ extern "C" void cache_picture(struct picture *picture)
 		QtConcurrent::run(hashPicture, picture);
 }
 
-void learnImages(const QDir dir, int max_recursions, bool recursed)
+void learnImages(const QDir dir, int max_recursions)
 {
-	QDir current(dir);
 	QStringList filters, files;
 
 	if (max_recursions) {
 		foreach (QString dirname, dir.entryList(QStringList(), QDir::NoDotAndDotDot | QDir::Dirs)) {
-			learnImages(QDir(dir.filePath(dirname)), max_recursions - 1, true);
+			learnImages(QDir(dir.filePath(dirname)), max_recursions - 1);
 		}
 	}
 
diff --git a/subsurface-core/qthelper.h b/subsurface-core/qthelper.h
index 09073e25b..3a5ef60e4 100644
--- a/subsurface-core/qthelper.h
+++ b/subsurface-core/qthelper.h
@@ -23,7 +23,7 @@ void read_hashes();
 void write_hashes();
 void updateHash(struct picture *picture);
 QByteArray hashFile(const QString filename);
-void learnImages(const QDir dir, int max_recursions, bool recursed);
+void learnImages(const QDir dir, int max_recursions);
 void add_hash(const QString filename, QByteArray hash);
 void hashPicture(struct picture *picture);
 QString localFilePath(const QString originalFilename);