diff --git a/CMakeLists.txt b/CMakeLists.txt
index 51657f6e43..af7bb77422 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3598,7 +3598,7 @@ if (SDL_DIALOG)
   if(ANDROID)
     sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/android/SDL_androiddialog.c)
     set(HAVE_SDL_DIALOG TRUE)
-  elseif(UNIX AND NOT APPLE AND NOT RISCOS AND NOT HAIKU)
+  elseif(UNIX AND NOT (APPLE OR RISCOS OR HAIKU OR CYGWIN))
     sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/unix/SDL_unixdialog.c)
     sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/unix/SDL_portaldialog.c)
     sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/unix/SDL_portaldialog.h)
@@ -3608,7 +3608,7 @@ if (SDL_DIALOG)
   elseif(HAIKU)
     sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/haiku/SDL_haikudialog.cc)
     set(HAVE_SDL_DIALOG TRUE)
-  elseif(WINDOWS)
+  elseif(WINDOWS OR CYGWIN)
     sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/windows/SDL_windowsdialog.c)
     set(HAVE_SDL_DIALOG TRUE)
   elseif(MACOS)
@@ -3616,7 +3616,7 @@ if (SDL_DIALOG)
     set(HAVE_SDL_DIALOG TRUE)
   endif()
 endif()
-if(UNIX AND NOT APPLE AND NOT RISCOS AND NOT HAIKU)
+if(UNIX AND NOT (APPLE OR RISCOS OR HAIKU OR CYGWIN))
   sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/unix/SDL_zenitymessagebox.h)
   sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/unix/SDL_zenitymessagebox.c)
 endif()