diff --git a/include/multiboot.h b/include/multiboot.h
index 4b4a3693a..ee0a34c83 100644
--- a/include/multiboot.h
+++ b/include/multiboot.h
@@ -18,6 +18,6 @@ void MultiBootInit(struct MultiBootParam *mp);
 int MultiBootMain(struct MultiBootParam *mp);
 void MultiBootStartProbe(struct MultiBootParam *mp);
 void MultiBootStartMaster(struct MultiBootParam *mp, const u8 *srcp, int length, u8 palette_color, s8 palette_speed);
-int MultiBootCheckComplete(struct MultiBootParam *mp);
+bool32 MultiBootCheckComplete(struct MultiBootParam *mp);
 
 #endif // GUARD_MULTIBOOT_H
diff --git a/src/multiboot.c b/src/multiboot.c
index b57adedd8..25b729dfd 100644
--- a/src/multiboot.c
+++ b/src/multiboot.c
@@ -327,7 +327,7 @@ void MultiBootStartMaster(struct MultiBootParam *mp, const u8 *srcp, int length,
     mp->probe_count = 0xd0;
 }
 
-int MultiBootCheckComplete(struct MultiBootParam *mp)
+bool32 MultiBootCheckComplete(struct MultiBootParam *mp)
 {
     if (mp->probe_count == 0xe9)
         return 1;