diff --git a/.appveyor.yml b/.appveyor.yml
index eb66f0aa..3e1a4a33 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -27,6 +27,7 @@ environment:
     OPENSSLDIR: C:\OpenSSL-v111-Win64\bin
     LIBCRYPTO: libssl-1_1-x64.dll
     LIBSSL: libcrypto-1_1-x64.dll
+    NSISDEF: /DQT6
 
 install:
 - cmd: >-
@@ -66,6 +67,6 @@ build_script:
     copy %OPENSSLDIR%\%LIBSSL% installer
 
 
-    makensis.exe installer\%NSI%
+    makensis.exe %NSISDEF% installer\%NSI%
 artifacts:
 - path: installer\GPXSee-*.exe
diff --git a/pkg/gpxsee64.nsi b/pkg/gpxsee64.nsi
index 552b259c..a6c3ca79 100644
--- a/pkg/gpxsee64.nsi
+++ b/pkg/gpxsee64.nsi
@@ -182,6 +182,17 @@ Section "QT framework" SEC_QT
 
   SectionIn RO
 
+!ifdef QT6
+  File "Qt6Concurrent.dll"
+  File "Qt6Core.dll"
+  File "Qt6Gui.dll"
+  File "Qt6Network.dll"
+  File "Qt6OpenGL.dll"
+  File "Qt6OpenGLWidgets.dll"
+  File "Qt6PrintSupport.dll"
+  File "Qt6Sql.dll"
+  File "Qt6Widgets.dll"
+!else
   File "Qt5Core.dll"
   File "Qt5Gui.dll"
   File "Qt5Widgets.dll"
@@ -189,6 +200,7 @@ Section "QT framework" SEC_QT
   File "Qt5Network.dll"
   File "Qt5Sql.dll"
   File "Qt5Concurrent.dll"
+!endif
   File /r "platforms"
   File /r "imageformats"
   File /r "printsupport"
@@ -215,6 +227,7 @@ Section "OpenSSL" SEC_OPENSSL
 
 SectionEnd
 
+!ifndef QT6
 Section "ANGLE" SEC_ANGLE
 
   File "libGLESv2.dll"
@@ -222,6 +235,7 @@ Section "ANGLE" SEC_ANGLE
   File "D3DCompiler_47.dll"
 
 SectionEnd
+!endif
 
 SectionGroup "Localization" SEC_LOCALIZATION
   !insertmacro LOCALIZATION "Czech" "cs"