diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 1a8508b7..cada183f 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -4260,7 +4260,7 @@ void FurnaceGUI::openFileDialog(FurnaceGUIFileDialogs type) {
       ImGuiFileDialog::Instance()->OpenModal("FileDialog","Save Instrument","Furnace instrument{.fui}",workingDir);
       break;
     case GUI_FILE_WAVE_OPEN:
-      ImGuiFileDialog::Instance()->OpenModal("FileDialog","Load Wavetable","compatible files{.fuw,dmw},.*",workingDir);
+      ImGuiFileDialog::Instance()->OpenModal("FileDialog","Load Wavetable","compatible files{.fuw,.dmw},.*",workingDir);
       break;
     case GUI_FILE_WAVE_SAVE:
       ImGuiFileDialog::Instance()->OpenModal("FileDialog","Save Wavetable","Furnace wavetable{.fuw}",workingDir);