diff --git a/vol-3-sort-and-search/src/distribution_count_sort.c b/vol-3-sort-and-search/src/distribution_count_sort.c
index efcf8fe..ebc19bf 100644
--- a/vol-3-sort-and-search/src/distribution_count_sort.c
+++ b/vol-3-sort-and-search/src/distribution_count_sort.c
@@ -1,5 +1,6 @@
 #include "distribution_count_sort.h"
 #include <string.h>
+#include <stdint.h>
 
 static unsigned int get_max(const unsigned int K[], const unsigned int len);