diff --git a/signal/micro/kernels/fft_test.cc b/signal/micro/kernels/fft_test.cc
index deda153ea53..4e6b84ad164 100644
--- a/signal/micro/kernels/fft_test.cc
+++ b/signal/micro/kernels/fft_test.cc
@@ -500,4 +500,20 @@ TEST(FftTest, FftAutoScaleTestLarge) {
                            nullptr, 0, output, &scale_bit));
 }
 
+TEST(FftTest, RfftInputLengthGreaterThanFftLengthFails) {
+  constexpr int kOutputLen = 66;
+  int input_shape[] = {1, 128};
+  float input[128] = {0};
+  int output_shape[] = {1, kOutputLen};
+  float golden[kOutputLen] = {0};
+  float output[kOutputLen];
+  const TFLMRegistration* registration =
+      tflite::tflm_signal::Register_RFFT_FLOAT();
+  EXPECT_EQ(kTfLiteError,
+            tflite::testing::TestFFT<float>(
+                input_shape, input, output_shape, golden, *registration,
+                g_gen_data_fft_length_64_float,
+                g_gen_data_size_fft_length_64_float, output, 1e-7));
+}
+
 TF_LITE_MICRO_TESTS_MAIN
diff --git a/signal/micro/kernels/rfft.cc b/signal/micro/kernels/rfft.cc
index c9472b05657..24d00ba0ed2 100644
--- a/signal/micro/kernels/rfft.cc
+++ b/signal/micro/kernels/rfft.cc
@@ -101,6 +101,8 @@ TfLiteStatus RfftPrepare(TfLiteContext* context, TfLiteNode* node) {
   params->output_length =
       output_shape.Dims(output_shape.DimensionsCount() - 1) / 2;
 
+  TF_LITE_ENSURE(context, params->input_length <= params->fft_length);
+
   context->RequestScratchBufferInArena(context, params->fft_length * sizeof(T),
                                        &params->scratch_buffer_index);
   micro_context->DeallocateTempTfLiteTensor(input);