diff --git a/src/gallium/drivers/llvmpipe/lp_bld_blend.c b/src/gallium/drivers/llvmpipe/lp_bld_blend.c
index e59c18c4725..edb46cb4e9d 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_blend.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_blend.c
@@ -321,6 +321,7 @@ lp_build_alpha_to_coverage(struct gallivm_state *gallivm,
                            struct lp_type type,
                            struct lp_build_mask_context *mask,
                            LLVMValueRef alpha,
+                           bool dither,
                            bool do_branch)
 {
    struct lp_build_context bld;
@@ -329,7 +330,7 @@ lp_build_alpha_to_coverage(struct gallivm_state *gallivm,
 
    lp_build_context_init(&bld, gallivm, type);
 
-   alpha_ref_value = lp_build_const_vec(gallivm, type, 0);
+   alpha_ref_value = lp_build_const_vec(gallivm, type, dither ? 0 : 0.5);
 
    test = lp_build_cmp(&bld, PIPE_FUNC_GREATER, alpha, alpha_ref_value);
 
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_blend.h b/src/gallium/drivers/llvmpipe/lp_bld_blend.h
index b5db966a666..8f0c0c99a3d 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_blend.h
+++ b/src/gallium/drivers/llvmpipe/lp_bld_blend.h
@@ -104,6 +104,7 @@ lp_build_alpha_to_coverage(struct gallivm_state *gallivm,
                            struct lp_type type,
                            struct lp_build_mask_context *mask,
                            LLVMValueRef alpha,
+                           bool dither,
                            bool do_branch);
 
 #endif /* !LP_BLD_BLEND_H */
diff --git a/src/gallium/drivers/llvmpipe/lp_state_fs.c b/src/gallium/drivers/llvmpipe/lp_state_fs.c
index 40c812766bf..27cbac712ff 100644
--- a/src/gallium/drivers/llvmpipe/lp_state_fs.c
+++ b/src/gallium/drivers/llvmpipe/lp_state_fs.c
@@ -1150,6 +1150,7 @@ generate_fs_loop(struct gallivm_state *gallivm,
          if (!key->multisample) {
             lp_build_alpha_to_coverage(gallivm, type,
                                        &mask, alpha,
+                                       key->blend.alpha_to_coverage_dither,
                                        (depth_mode & LATE_DEPTH_TEST) != 0);
          } else {
             lp_build_sample_alpha_to_coverage(gallivm, type, key->coverage_samples, num_loop,