diff --git a/game_private.c b/game_private.c
index 0791765..ee69e46 100644
--- a/game_private.c
+++ b/game_private.c
@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-int max(int a, int b) {
+unsigned int max(unsigned int a, unsigned int b) {
 	if (a > b)
 		return a;
 	return b;
diff --git a/game_private.h b/game_private.h
index 2653cbc..ec6f3b3 100644
--- a/game_private.h
+++ b/game_private.h
@@ -15,11 +15,11 @@ struct game_s {
 /**
  * @brief return the max between a and b
  *
- * @param a int to test
- * @param b int to test
+ * @param a uint to test
+ * @param b uint to test
  * @return the max between a and b
  */
-int max(int a, int b);
+unsigned int max(unsigned int a, unsigned int b);
 
 /**
  * @brief check if the pointer is NULL fprinf and exit else nothing