diff --git a/modules/prediction/common/prediction_gflags.cc b/modules/prediction/common/prediction_gflags.cc
index d1ac70ccd3909fecbbaeed50fa80bda88dacd5b8..8205b26f5cd08559ac3bc18e980a8a34ff3256f8 100644
--- a/modules/prediction/common/prediction_gflags.cc
+++ b/modules/prediction/common/prediction_gflags.cc
@@ -63,7 +63,6 @@ DEFINE_bool(enable_pedestrian_acc, false, "Enable calculating speed by acc");
 DEFINE_double(coeff_mul_sigma, 2.0, "coefficient multiply standard deviation");
 DEFINE_double(pedestrian_min_speed, 0.1, "min speed for still pedestrian");
 DEFINE_double(pedestrian_max_speed, 10.0, "speed upper bound for pedestrian");
-DEFINE_double(pedestrian_min_acc, -4.0, "minimum pedestrian acceleration");
 DEFINE_double(pedestrian_max_acc, 2.0, "maximum pedestrian acceleration");
 DEFINE_double(prediction_pedestrian_total_time, 10.0,
               "Total prediction time for pedestrians");
diff --git a/modules/prediction/common/prediction_gflags.h b/modules/prediction/common/prediction_gflags.h
index efd8e7227e0b710d2a4fdd7420be931973a2e948..21268b7ac6e8af0686097479a1e114185c5608b0 100644
--- a/modules/prediction/common/prediction_gflags.h
+++ b/modules/prediction/common/prediction_gflags.h
@@ -52,7 +52,6 @@ DECLARE_bool(enable_pedestrian_acc);
 DECLARE_double(coeff_mul_sigma);
 DECLARE_double(pedestrian_min_speed);
 DECLARE_double(pedestrian_max_speed);
-DECLARE_double(pedestrian_min_acc);
 DECLARE_double(pedestrian_max_acc);
 DECLARE_double(prediction_pedestrian_total_time);
 DECLARE_int32(num_trajectory_still_pedestrian);