diff --git a/deps/GLEW/GLEW.cmake b/deps/GLEW/GLEW.cmake
index cef56e72e2..82bfc0bb84 100644
--- a/deps/GLEW/GLEW.cmake
+++ b/deps/GLEW/GLEW.cmake
@@ -5,6 +5,8 @@ find_package(OpenGL QUIET REQUIRED)
 orcaslicer_add_cmake_project(
   GLEW
   SOURCE_DIR  ${CMAKE_CURRENT_LIST_DIR}/glew
+  CMAKE_ARGS
+    -DGLEW_USE_EGL=OFF
 )
 
 if (MSVC)
diff --git a/deps/GLEW/glew/CMakeLists.txt b/deps/GLEW/glew/CMakeLists.txt
index 4aa10c9188..7f1687c4e2 100644
--- a/deps/GLEW/glew/CMakeLists.txt
+++ b/deps/GLEW/glew/CMakeLists.txt
@@ -3,9 +3,17 @@ project(GLEW)
 
 find_package(OpenGL REQUIRED)
 
-if(OpenGL_EGL_FOUND)
-    message(STATUS "building GLEW for EGL (hope that wxWidgets agrees, otherwise you won't have any output!)")
+# Allow parent project to control EGL usage.
+# Default to OFF since OrcaSlicer forces GDK_BACKEND=x11 (using GLX contexts).
+# GLEW must use glXGetProcAddressARB (GLX) to match wxWidgets GL canvas.
+# Using EGL function loading with GLX contexts causes rendering failures.
+option(GLEW_USE_EGL "Use EGL instead of GLX for OpenGL function loading" OFF)
+
+if(GLEW_USE_EGL)
+    message(STATUS "Building GLEW with EGL support")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DGLEW_EGL")
+else()
+    message(STATUS "Building GLEW with GLX support")
 endif()
 
 add_library(GLEW src/glew.c)
diff --git a/deps/wxWidgets/wxWidgets.cmake b/deps/wxWidgets/wxWidgets.cmake
index 3a52d14198..cb25f0eb45 100644
--- a/deps/wxWidgets/wxWidgets.cmake
+++ b/deps/wxWidgets/wxWidgets.cmake
@@ -51,6 +51,7 @@ orcaslicer_add_cmake_project(
         -DwxUSE_UNICODE=ON
         -DwxUSE_PRIVATE_FONTS=ON
         -DwxUSE_OPENGL=ON
+        -DwxUSE_GLCANVAS_EGL=OFF
         -DwxUSE_WEBREQUEST=ON
         -DwxUSE_WEBVIEW=ON
         ${_wx_edge}
diff --git a/src/slic3r/GUI/OpenGLManager.cpp b/src/slic3r/GUI/OpenGLManager.cpp
index 39860ab9a8..17c372a59f 100644
--- a/src/slic3r/GUI/OpenGLManager.cpp
+++ b/src/slic3r/GUI/OpenGLManager.cpp
@@ -25,6 +25,18 @@
 #include "../Utils/MacDarkMode.hpp"
 #endif // __APPLE__
 
+// Verify GLEW and wxWidgets use the same OpenGL backend (EGL vs GLX).
+// A mismatch causes rendering failures: GLEW's function loading must match
+// the context type created by wxWidgets.
+#if defined(__linux__)
+    #if defined(GLEW_EGL) && (!defined(wxUSE_GLCANVAS_EGL) || !wxUSE_GLCANVAS_EGL)
+        #error "OpenGL backend mismatch: GLEW has EGL support enabled but wxWidgets does not. Ensure GLEW_USE_EGL and wxUSE_GLCANVAS_EGL are both ON or both OFF."
+    #endif
+    #if !defined(GLEW_EGL) && defined(wxUSE_GLCANVAS_EGL) && wxUSE_GLCANVAS_EGL
+        #error "OpenGL backend mismatch: wxWidgets has EGL support enabled but GLEW does not. Ensure GLEW_USE_EGL and wxUSE_GLCANVAS_EGL are both ON or both OFF."
+    #endif
+#endif
+
 namespace Slic3r {
 namespace GUI {