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-rw-r--r--src/mesa/main/context.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index b7cd5686685..b818ab41a6b 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -587,7 +587,7 @@ _mesa_init_constants(struct gl_context *ctx)
ctx->Const.MaxSpotExponent = 128.0;
ctx->Const.MaxViewportWidth = MAX_VIEWPORT_WIDTH;
ctx->Const.MaxViewportHeight = MAX_VIEWPORT_HEIGHT;
- ctx->Const.MinMapBufferAlignment = 1;
+ ctx->Const.MinMapBufferAlignment = 64;
/* Driver must override these values if ARB_viewport_array is supported. */
ctx->Const.MaxViewports = 1;