diff --git a/code/renderer/tr_shader.c b/code/renderer/tr_shader.c
index 3de2bba4..f628b676 100644
--- a/code/renderer/tr_shader.c
+++ b/code/renderer/tr_shader.c
@@ -1230,7 +1230,11 @@ static void ParseSkyParms( char **text ) {
 		for (i=0 ; i<6 ; i++) {
 			Com_sprintf( pathname, sizeof(pathname), "%s_%s.tga"
 				, token, suf[i] );
+#ifdef GL_CLAMP_TO_EDGE
+			shader.sky.outerbox[i] = R_FindImageFile( ( char * ) pathname, qtrue, qtrue, GL_CLAMP_TO_EDGE );
+#else
 			shader.sky.outerbox[i] = R_FindImageFile( ( char * ) pathname, qtrue, qtrue, GL_CLAMP );
+#endif
 			if ( !shader.sky.outerbox[i] ) {
 				shader.sky.outerbox[i] = tr.defaultImage;
 			}