diff --git a/cpp/src/io/fst/agent_dfa.cuh b/cpp/src/io/fst/agent_dfa.cuh
index 52fd039c097..f867a95a864 100644
--- a/cpp/src/io/fst/agent_dfa.cuh
+++ b/cpp/src/io/fst/agent_dfa.cuh
@@ -92,6 +92,9 @@ class DFASimulationCallbackWrapper {
   {
     uint32_t const count = transducer_table(old_state, symbol_id, read_symbol);
     if (write) {
+#if __CUDA_ARCH__ > 0
+#pragma unroll 1
+#endif
       for (uint32_t out_char = 0; out_char < count; out_char++) {
         out_it[out_count + out_char] =
           transducer_table(old_state, symbol_id, out_char, read_symbol);