fix EGL extension string names
diff --git a/opengl/libagl/egl.cpp b/opengl/libagl/egl.cpp
index 4cf0bf8..f50257a 100644
--- a/opengl/libagl/egl.cpp
+++ b/opengl/libagl/egl.cpp
@@ -774,7 +774,7 @@
 static char const * const gVersionString    = "1.2 Android Driver";
 static char const * const gClientApiString  = "OpenGL ES";
 static char const * const gExtensionsString =
-        "KHR_image_base "
+        "EGL_KHR_image_base "
         // "KHR_image_pixmap "
         "EGL_ANDROID_image_native_buffer "
         "EGL_ANDROID_swap_rectangle "