diff --git a/vllm/engine/arg_utils.py b/vllm/engine/arg_utils.py
index ce0f1708235f..ec61fc4b9b06 100644
--- a/vllm/engine/arg_utils.py
+++ b/vllm/engine/arg_utils.py
@@ -1160,11 +1160,12 @@ def create_engine_config(
 
         # Set default arguments for V1 Engine.
         self._set_default_args(usage_context, model_config)
-        # Disable chunked prefill for POWER (ppc64le)/ARM/s390x CPUs in V1
+        # Disable chunked prefill for POWER (ppc64le)/ARM/s390x/RISCV CPUs in V1
         if current_platform.is_cpu() and current_platform.get_cpu_architecture(
-        ) in (CpuArchEnum.POWERPC, CpuArchEnum.S390X, CpuArchEnum.ARM):
-            logger.info("Chunked prefill is not supported for ARM and POWER "
-                        "and S390X CPUs; "
+        ) in (CpuArchEnum.POWERPC, CpuArchEnum.S390X, CpuArchEnum.ARM,
+              CpuArchEnum.RISCV):
+            logger.info("Chunked prefill is not supported for ARM and POWER, "
+                        "S390X and RISC-V CPUs; "
                         "disabling it for V1 backend.")
             self.enable_chunked_prefill = False
         assert self.enable_chunked_prefill is not None