diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ce9ef27b930..3e9d76f165a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -36,14 +36,21 @@ if (SLIC3R_GUI)
             find_package(wxWidgets 3.1 REQUIRED COMPONENTS base core adv html gl aui net media webview)
         endif ()
     else ()
-        find_package(wxWidgets 3.1 REQUIRED COMPONENTS html adv gl core base webview aui net media)
+        # wxWidgets 3.3 ships CMake config files; use CONFIG mode so wxWidgets_DIR
+        # is honored. The legacy FindwxWidgets module ignores wxWidgets_DIR and
+        # only probes WXWIN/wx-config, which is unset on the Windows builder.
+        find_package(wxWidgets 3.3 CONFIG REQUIRED COMPONENTS html adv gl core base webview aui net media)
     endif ()
 
     if(UNIX)
         message(STATUS "wx-config path: ${wxWidgets_CONFIG_EXECUTABLE}")
     endif()
 
-    include(${wxWidgets_USE_FILE})
+    # CONFIG mode (Windows, wx 3.3) does not set wxWidgets_USE_FILE; only the
+    # legacy module mode (Linux wx-config) does. Guard the include accordingly.
+    if(wxWidgets_USE_FILE)
+        include(${wxWidgets_USE_FILE})
+    endif()
 
     find_package(JPEG QUIET)