diff --git a/include/osg/Image b/include/osg/Image
index be8ac9f9f..0c82ff8b7 100644
--- a/include/osg/Image
+++ b/include/osg/Image
@@ -82,6 +82,7 @@
     #define GL_LUMINANCE8           0x8040
     #define GL_LUMINANCE8_ALPHA8    0x8045
     #define GL_RGBA8                0x8058
+    #define GL_RGBA16               0x805B
     #define GL_PACK_ROW_LENGTH      0x0D02
 #endif