diff --git a/deploy/lite/include/picodet_postprocess.h b/deploy/lite/include/picodet_postprocess.h
index 415ef69e548c9c1ce3b485d391dbe9945c6e0c83..ac33e92ba167cb8a9c3bfaae9991522c358d6d0c 100644
--- a/deploy/lite/include/picodet_postprocess.h
+++ b/deploy/lite/include/picodet_postprocess.h
@@ -20,6 +20,7 @@
 #include <utility>
 #include <ctime>
 #include <numeric>
+#include <math.h>
 
 #include "include/utils.h"
 
@@ -35,4 +36,4 @@ void PicoDetPostProcess(std::vector<PaddleDetection::ObjectResult>* results,
                          int num_class = 80,
                          int reg_max = 7);
 
-}  // namespace PaddleDetection
\ No newline at end of file
+}  // namespace PaddleDetection