diff --git a/doc/changelog.dox b/doc/changelog.dox
index 2f73844c4..25d392d41 100644
--- a/doc/changelog.dox
+++ b/doc/changelog.dox
@@ -399,6 +399,8 @@ See also:
 -   `FindEGL.cmake`, `FindOpenAL.cmake`, `FindOpenGLES2.cmake` and
     `FindOpenGLES3.cmake` now explicitly link to the `GL` and `openal`
     libraries on Emscripten, which is needed for `MINIMAL_BUILD`
+-   `FindOpenGLES2.cmake` and `FindOpenGLES3.cmake` don't require GL ES headers
+    to be installed on the system anymore, as Magnum uses its own copies
 -   Fixed linking of static `Any*` plugins when the libraries are otherwise
     build as dynamic
 -   Removed mention of the outdated Ubuntu PPA from @ref building as it doesn't
diff --git a/modules/FindOpenGLES2.cmake b/modules/FindOpenGLES2.cmake
index 1ed6f9706..afbfc3389 100644
--- a/modules/FindOpenGLES2.cmake
+++ b/modules/FindOpenGLES2.cmake
@@ -10,7 +10,10 @@
 # Additionally these variables are defined for internal usage:
 #
 #  OPENGLES2_LIBRARY        - OpenGL ES 2 library
-#  OPENGLES2_INCLUDE_DIR    - Include dir
+#
+# Please note this find module is tailored especially for the needs of Magnum.
+# In particular, it depends on its platform definitions and doesn't look for
+# OpenGL ES includes as Magnum has its own, generated using flextGL.
 #
 
 #
@@ -53,17 +56,9 @@ else()
         OpenGLES)
 endif()
 
-# Include dir
-find_path(OPENGLES2_INCLUDE_DIR NAMES
-    GLES2/gl2.h
-
-    # iOS
-    ES2/gl.h)
-
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(OpenGLES2 DEFAULT_MSG
-    OPENGLES2_LIBRARY
-    OPENGLES2_INCLUDE_DIR)
+    OPENGLES2_LIBRARY)
 
 if(NOT TARGET OpenGLES2::OpenGLES2)
     # Work around BUGGY framework support on macOS. Do this also in case of
@@ -78,7 +73,4 @@ if(NOT TARGET OpenGLES2::OpenGLES2)
         set_property(TARGET OpenGLES2::OpenGLES2 PROPERTY
             IMPORTED_LOCATION ${OPENGLES2_LIBRARY})
     endif()
-
-    set_property(TARGET OpenGLES2::OpenGLES2 PROPERTY
-        INTERFACE_INCLUDE_DIRECTORIES ${OPENGLES2_INCLUDE_DIR})
 endif()
diff --git a/modules/FindOpenGLES3.cmake b/modules/FindOpenGLES3.cmake
index d1750bb17..f78c1eb53 100644
--- a/modules/FindOpenGLES3.cmake
+++ b/modules/FindOpenGLES3.cmake
@@ -10,7 +10,10 @@
 # Additionally these variables are defined for internal usage:
 #
 #  OPENGLES3_LIBRARY        - OpenGL ES 3 library
-#  OPENGLES3_INCLUDE_DIR    - Include dir
+#
+# Please note this find module is tailored especially for the needs of Magnum.
+# In particular, it depends on its platform definitions and doesn't look for
+# OpenGL ES includes as Magnum has its own, generated using flextGL.
 #
 
 #
@@ -57,17 +60,9 @@ else()
         OpenGLES)
 endif()
 
-# Include dir
-find_path(OPENGLES3_INCLUDE_DIR NAMES
-    GLES3/gl3.h
-
-    # iOS
-    ES3/gl.h)
-
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args("OpenGLES3" DEFAULT_MSG
-    OPENGLES3_LIBRARY
-    OPENGLES3_INCLUDE_DIR)
+    OPENGLES3_LIBRARY)
 
 if(NOT TARGET OpenGLES3::OpenGLES3)
     # Work around BUGGY framework support on macOS. Do this also in case of
@@ -83,9 +78,6 @@ if(NOT TARGET OpenGLES3::OpenGLES3)
             IMPORTED_LOCATION ${OPENGLES3_LIBRARY})
     endif()
 
-    set_property(TARGET OpenGLES3::OpenGLES3 PROPERTY
-        INTERFACE_INCLUDE_DIRECTORIES ${OPENGLES3_INCLUDE_DIR})
-
     # Emscripten needs a special flag to use WebGL 2. CMake 3.13 allows to set
     # this via INTERFACE_LINK_OPTIONS, for older versions we modify the global
     # CMAKE_EXE_LINKER_FLAGS inside FindMagnum.cmake.