diff --git a/GameLib/GameLib.h b/GameLib/GameLib.h
index dfa2163..7589fc6 100644
--- a/GameLib/GameLib.h
+++ b/GameLib/GameLib.h
@@ -54,11 +54,13 @@ void GameLib_Loop(
 /////////////////////////////
 // GameLib_GetPos
 // GameLib_SetPos
+// GameLib_UpdatePos
 // GameLib_SetPos
 //
 //
 void GameLib_GetPos(int pos[2]);
 void GameLib_SetPos(int pos[2]);
+void GameLib_UpdatePos(int pos[2]);
 void GameLib_GetSize(int size[2]);
 
 
diff --git a/GameLib/Util.c b/GameLib/Util.c
index 03768f5..b4ca6ad 100644
--- a/GameLib/Util.c
+++ b/GameLib/Util.c
@@ -4,6 +4,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
+#include <math.h>
 
 #include "Util.h"