diff --git a/src/graphics.c b/src/graphics.c
index 32432f9..7622a07 100644
--- a/src/graphics.c
+++ b/src/graphics.c
@@ -185,26 +185,26 @@ static int const win32_bg_palette[] =
 #endif
 
 #if defined(USE_GL)
-static unsigned int const gl_bgpal[] =
-  {
-    0,
-    0x0000007F,
-    0x00007F00,
-    0x00007F7F,
-    0x007F0000,
-    0x007F007F,
-    0x007F7F00,
-    0x007F7F7F,
+static GLbyte const gl_bgpal[][4] =
+{
+    { 0x00, 0x00, 0x00, 0x7f },
+    { 0x00, 0x00, 0x3f, 0x7f },
+    { 0x00, 0x3f, 0x00, 0x7f },
+    { 0x00, 0x3f, 0x3f, 0x7f },
+    { 0x3f, 0x00, 0x00, 0x7f },
+    { 0x3f, 0x00, 0x3f, 0x7f },
+    { 0x3f, 0x3f, 0x00, 0x7f },
+    { 0x3f, 0x3f, 0x3f, 0x7f },
     // + intensity
-    0x00000000,
-    0x000000FF,
-    0x0000FF00,
-    0x0000FFFF,
-    0x00FF0000,
-    0x00FF00FF,
-    0x00FFFF00,
-    0x00FFFFFF,
-  };
+    { 0x00, 0x00, 0x00, 0x7f },
+    { 0x00, 0x00, 0x7f, 0x7f },
+    { 0x00, 0x7f, 0x00, 0x7f },
+    { 0x00, 0x7f, 0x7f, 0x7f },
+    { 0x7f, 0x00, 0x00, 0x7f },
+    { 0x7f, 0x00, 0x7f, 0x7f },
+    { 0x7f, 0x7f, 0x00, 0x7f },
+    { 0x7f, 0x7f, 0x7f, 0x7f }
+};
 
 static caca_t *gl_kk; /* FIXME: we ought to get rid of this */
 #endif