diff --git a/hw/xbox/nv2a.c b/hw/xbox/nv2a.c
index 4735c69017..d95090e116 100644
--- a/hw/xbox/nv2a.c
+++ b/hw/xbox/nv2a.c
@@ -944,6 +944,7 @@ typedef struct ColorFormatInfo {
     GLint gl_internal_format;
     GLenum gl_format;
     GLenum gl_type;
+    GLenum swizzle_mask[4];
 } ColorFormatInfo;
 
 static const ColorFormatInfo kelvin_color_format_map[66] = {
@@ -975,9 +976,9 @@ static const ColorFormatInfo kelvin_color_format_map[66] = {
         {2, true, GL_RGB5, GL_RGB, GL_UNSIGNED_SHORT_5_6_5},
     [NV097_SET_TEXTURE_FORMAT_COLOR_LU_IMAGE_A8R8G8B8] =
         {4, true, GL_RGBA8, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV},
-    /* TODO: how do opengl alpha textures work? */
     [NV097_SET_TEXTURE_FORMAT_COLOR_SZ_A8] =
-        {2, false, GL_R8, GL_RED, GL_UNSIGNED_BYTE},
+        {2, false, GL_R8, GL_RED, GL_UNSIGNED_BYTE,
+         {GL_ZERO, GL_ZERO, GL_ZERO, GL_RED}},
     [NV097_SET_TEXTURE_FORMAT_COLOR_LU_IMAGE_X8R8G8B8] =
         {4, true, GL_RGB8, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV},
     /* TODO: format conversion */
@@ -1894,6 +1895,12 @@ static TextureBinding* generate_texture(const TextureShape s,
         }
     }
 
+    if (f.swizzle_mask[0] != 0 || f.swizzle_mask[1] != 0
+        || f.swizzle_mask[2] != 0 || f.swizzle_mask[3] != 0) {
+        glTexParameteriv(gl_target, GL_TEXTURE_SWIZZLE_RGBA,
+                         (const GLint *)f.swizzle_mask);
+    }
+
     TextureBinding* ret = g_malloc(sizeof(TextureBinding));
     ret->gl_target = gl_target;
     ret->gl_texture = gl_texture;