diff --git a/build/cmake/files.cmake b/build/cmake/files.cmake
index 1253477e0b..f48332ddc7 100644
--- a/build/cmake/files.cmake
+++ b/build/cmake/files.cmake
@@ -3099,6 +3099,16 @@ set(OPENGL_MSW_HDR
     wx/msw/glcanvas.h
 )
 
+set(OPENGL_GTK_SRC
+    src/gtk/glcanvas.cpp
+    src/unix/glx11.cpp
+)
+
+set(OPENGL_GTK_HDR
+    wx/gtk/glcanvas.h
+    wx/unix/glx11.h
+)
+
 set(OPENGL_OSX_SHARED_SRC
     src/osx/cocoa/glcanvas.mm
     src/osx/glcanvas_osx.cpp
diff --git a/build/cmake/lib/gl/CMakeLists.txt b/build/cmake/lib/gl/CMakeLists.txt
index 4b656a8217..18ac4ac855 100644
--- a/build/cmake/lib/gl/CMakeLists.txt
+++ b/build/cmake/lib/gl/CMakeLists.txt
@@ -13,6 +13,8 @@ wx_append_sources(GL_FILES OPENGL_CMN)
 
 if(WIN32)
     wx_append_sources(GL_FILES OPENGL_MSW)
+elseif(WXGTK)
+    wx_append_sources(GL_FILES OPENGL_GTK)
 elseif(APPLE)
     wx_append_sources(GL_FILES OPENGL_OSX_SHARED)
 endif()
diff --git a/build/files b/build/files
index e38e8fd584..91dc2c0db9 100644
--- a/build/files
+++ b/build/files
@@ -3005,6 +3005,14 @@ OPENGL_CMN_HDR =
 OPENGL_MSW_SRC =
     src/msw/glcanvas.cpp
 
+OPENGL_GTK_HDR =
+    wx/gtk/glcanvas.h
+    wx/unix/glx11.h
+
+OPENGL_GTK_SRC =
+    src/gtk/glcanvas.cpp
+    src/unix/glx11.cpp
+
 OPENGL_MSW_HDR =
     wx/msw/glcanvas.h