diff --git a/ref/soft/r_surf.c b/ref/soft/r_surf.c
index ff4925e4..c34f4995 100644
--- a/ref/soft/r_surf.c
+++ b/ref/soft/r_surf.c
@@ -53,7 +53,7 @@ static void     (*surfmiptable[4])( void ) = {
 };
 
 // void R_BuildLightMap (void);
-extern unsigned blocklights[10240]; // allow some very large lightmaps
+static unsigned blocklights[10240]; // allow some very large lightmaps
 
 static float           surfscale;
 static qboolean        r_cache_thrash;         // set if surface cache is thrashing