diff --git a/python/sglang/multimodal_gen/runtime/layers/attention/backends/aiter.py b/python/sglang/multimodal_gen/runtime/layers/attention/backends/aiter.py
index 49b02b031..7f69be843 100755
--- a/python/sglang/multimodal_gen/runtime/layers/attention/backends/aiter.py
+++ b/python/sglang/multimodal_gen/runtime/layers/attention/backends/aiter.py
@@ -20,7 +20,7 @@ from sglang.srt.models.deepseek_common.utils import _use_aiter_gfx95
 
 logger = logging.getLogger(__name__)
 
-_use_fp8_attn = os.environ.get("SGLANG_AITER_FP8_ATTN", "0") == "1"
+_use_fp8_attn = os.environ.get("SGLANG_DIFFUSION_AITER_FP8_ATTN", "0") == "1"
 _fp8_dtype = torch.float8_e4m3fn
 
 # ── MLA prefill ASM kernel constraints ──────────────────────────────
@@ -47,7 +47,7 @@ _MLA_PREFILL_HEAD_TILE = 8
 
 
 if _use_fp8_attn:
-    logger.info("DiT FP8 attention enabled via SGLANG_AITER_FP8_ATTN=1")
+    logger.info("DiT FP8 attention enabled via SGLANG_DIFFUSION_AITER_FP8_ATTN=1")
 
 
 def _can_use_mla_prefill(v_head_dim: int, num_heads: int) -> bool:
@@ -335,7 +335,7 @@ class AITerImpl(AttentionImpl):
     ) -> torch.Tensor:
         """
         Performs attention using one of:
-          - _mla_prefill_ps_attention (FP8, SGLANG_AITER_FP8_ATTN=1)
+          - _mla_prefill_ps_attention (FP8, SGLANG_DIFFUSION_AITER_FP8_ATTN=1)
           - flash_attn_func (BF16, default or FP8 fallback for unsupported shapes)
 
         Args:
diff --git a/test/registered/amd/test_wan22_fp8_mla.py b/test/registered/amd/test_wan22_fp8_mla.py
index 74f1b3f70..7bbfd82a4 100644
--- a/test/registered/amd/test_wan22_fp8_mla.py
+++ b/test/registered/amd/test_wan22_fp8_mla.py
@@ -28,7 +28,7 @@ logger = logging.getLogger(__name__)
 register_amd_ci(est_time=3600, suite="nightly-amd-fp8-mla-diffusion", nightly=True)
 
 MODEL = "Wan-AI/Wan2.2-T2V-A14B-Diffusers"
-FP8_ENV = {"SGLANG_AITER_FP8_ATTN": "1"}
+FP8_ENV = {"SGLANG_DIFFUSION_AITER_FP8_ATTN": "1"}
 
 FP8_MLA_CASES = [
     DiffusionTestCase(