diff --git a/src/slic3r/GUI/Search.cpp b/src/slic3r/GUI/Search.cpp
index 75de52ba462..d036fcef739 100644
--- a/src/slic3r/GUI/Search.cpp
+++ b/src/slic3r/GUI/Search.cpp
@@ -38,7 +38,7 @@ using GUI::into_u8;
 
 namespace Search {
 
-static char marker_by_type(Preset::Type type, PrinterTechnology pt)
+static wchar_t marker_by_type(Preset::Type type, PrinterTechnology pt)
 {
     switch(type) {
     case Preset::TYPE_PRINT:
@@ -53,7 +53,7 @@ static char marker_by_type(Preset::Type type, PrinterTechnology pt)
     case Preset::TYPE_PREFERENCES:
         return ImGui::PreferencesButton;
     default:
-        return ' ';
+        return L' ';
 	}
 }