diff --git a/src/qt_gui/main_window.cpp b/src/qt_gui/main_window.cpp
index 9311b156..c21ad697 100644
--- a/src/qt_gui/main_window.cpp
+++ b/src/qt_gui/main_window.cpp
@@ -280,7 +280,7 @@ void MainWindow::InstallPkg() {
 
 void MainWindow::InstallDragDropPkg(std::string file, int pkgNum, int nPkg) {
 
-    if (detectFileType(file) == FILETYPE_PKG) {
+    if (DetectFileType(file) == FILETYPE_PKG) {
         PKG pkg;
         pkg.Open(file);
         std::string failreason;