diff --git a/vllm/model_executor/models/gemma3n_mm.py b/vllm/model_executor/models/gemma3n_mm.py
index 4e9838805e5..2b5266f0c9f 100644
--- a/vllm/model_executor/models/gemma3n_mm.py
+++ b/vllm/model_executor/models/gemma3n_mm.py
@@ -421,6 +421,7 @@ class Gemma3nMultimodalEmbedder(nn.Module):
             self.multimodal_hidden_size,
             self.text_hidden_size,
             bias=False,
+            input_is_parallel=False,  # scatter the full-width input internally
         )
 
         self.embedding_post_projection_norm = RMSNorm(