diff --git a/src/slic3r/GUI/GUI_Utils.cpp b/src/slic3r/GUI/GUI_Utils.cpp
index 8ad757f0d2..697eefea0b 100644
--- a/src/slic3r/GUI/GUI_Utils.cpp
+++ b/src/slic3r/GUI/GUI_Utils.cpp
@@ -9,7 +9,6 @@
 
 #ifdef _WIN32
     #include <Windows.h>
-    #include <appmodel.h>
     #include "libslic3r/AppConfig.hpp"
     #include <wx/msw/registry.h>
 #endif // _WIN32
@@ -48,35 +47,6 @@ wxString format_nozzle_diameter(float diameter)
     return wxString::Format("%smm", wxString::FromDouble(diameter));
 }
 
-bool is_running_in_msix()
-{
-#ifdef _WIN32
-    // Null-buffer probe: returns ERROR_INSUFFICIENT_BUFFER when packaged,
-    // APPMODEL_ERROR_NO_PACKAGE when running unpackaged.
-    static const bool packaged = []() {
-        UINT32 length = 0;
-        return ::GetCurrentPackageFullName(&length, nullptr) != APPMODEL_ERROR_NO_PACKAGE;
-    }();
-    return packaged;
-#else
-    return false;
-#endif
-}
-
-void open_ms_store_product_page()
-{
-#ifdef _WIN32
-    UINT32 length = 0;
-    if (::GetCurrentPackageFamilyName(&length, nullptr) != ERROR_INSUFFICIENT_BUFFER)
-        return;
-    std::wstring family_name(length, L'\0');
-    if (::GetCurrentPackageFamilyName(&length, family_name.data()) != ERROR_SUCCESS)
-        return;
-    family_name.resize(length > 0 ? length - 1 : 0); // drop the terminating null
-    wxLaunchDefaultBrowser(wxString(L"ms-windows-store://pdp/?PFN=") + family_name.c_str());
-#endif
-}
-
 CopyFileResult copy_file_gui(const std::string &from, const std::string &to, std::string& error_message, const bool with_check)
 {
 #ifdef WIN32
@@ -202,6 +172,42 @@ template<class F> typename F::FN winapi_get_function(const wchar_t *dll, const c
 }
 #endif
 
+bool is_running_in_msix()
+{
+#ifdef _WIN32
+    // The package identity APIs are Win8+ - resolved dynamically so the exe still loads on Win7
+    // (same treatment as the DPI APIs below). Null-buffer probe: returns ERROR_INSUFFICIENT_BUFFER
+    // when packaged, APPMODEL_ERROR_NO_PACKAGE when running unpackaged.
+    struct GetCurrentPackageFullName_t { typedef LONG (WINAPI *FN)(UINT32 *length, PWSTR full_name); };
+    static const bool packaged = []() {
+        auto fn = winapi_get_function<GetCurrentPackageFullName_t>(L"Kernel32.dll", "GetCurrentPackageFullName");
+        UINT32 length = 0;
+        return fn != nullptr && fn(&length, nullptr) != APPMODEL_ERROR_NO_PACKAGE;
+    }();
+    return packaged;
+#else
+    return false;
+#endif
+}
+
+void open_ms_store_product_page()
+{
+#ifdef _WIN32
+    struct GetCurrentPackageFamilyName_t { typedef LONG (WINAPI *FN)(UINT32 *length, PWSTR family_name); };
+    static auto fn = winapi_get_function<GetCurrentPackageFamilyName_t>(L"Kernel32.dll", "GetCurrentPackageFamilyName");
+    if (fn == nullptr)
+        return;
+    UINT32 length = 0;
+    if (fn(&length, nullptr) != ERROR_INSUFFICIENT_BUFFER)
+        return;
+    std::wstring family_name(length, L'\0');
+    if (fn(&length, family_name.data()) != ERROR_SUCCESS)
+        return;
+    family_name.resize(length > 0 ? length - 1 : 0); // drop the terminating null
+    wxLaunchDefaultBrowser(wxString(L"ms-windows-store://pdp/?PFN=") + family_name.c_str());
+#endif
+}
+
 // If called with nullptr, a DPI for the primary monitor is returned.
 int get_dpi_for_window(const wxWindow *window)
 {