diff --git a/programs/games/nsider/game.c b/programs/games/nsider/game.c
index 58b425b37f..46ab45561a 100644
--- a/programs/games/nsider/game.c
+++ b/programs/games/nsider/game.c
@@ -78,11 +78,11 @@ int THE_END_COUNT=600;
 #include <stdlib.h>
 #include <string.h>
 #include <kolibrisys.h>
-#include <Gamealphabet.h>
+#include <GameAlphabet.h>
 #include <Shimath.h>
 #include <Draw2D.h>
 #include <Levels.h>
-#include <Gamefunctions.h>
+#include <GameFunctions.h>